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BLISS ELECTRICAL SCHOOL A Marvelous Machine ! and Pipe Mill Machine. MFG. CO. 501 Curtiss 'American-Hunnings' TELEPHONES. AMERICAN ELECTRIC TELEPHONE CO. 173 South Canal St. Chicag Ill. Automobiles Pounded by Mathew Carey 785. - 810 Walnut St.

Drawing Copying and Ink Pencils Sample worth double the money will be sent you on receipt of 10c. A. W. FABER Polar Water Stills CHICAG THE PERFECT PROTRACTOR Walsh Window Tent Hartford Fire Insurance Cowan High Wheels Travel all Roads Because all

AGENTS KEYSTONE Fire Extinguisher JAMES BOYD Je BROTHER 18 N. 4th St. Philadelphia Manufacturers ol PIRE1 PROTECTION EQUIPMENT Fire Hose Hose THE PANAMA CANAL IS DESCRIBED CABOT'S5lazZeZnar BooaMA88. Write Arithmetic dmscsInstitute. i for Course.

IMPROVED METHOD OF DRAWING PATTERNS FOR FLAR ING VESSELS OF SHEET METAL. TommasPs Flux Motor. Improved Liquid (or Galvanic Battery. The American Steam Safe Company. TOMMASI'S NEW FLUX MOTOR. ADJUSTABLE TENSION RAZOR STROP. Purification of Crude Fats

The Middle West Number of the SCIENTIFIC AMERICAN On December llth 1909 the Scien tific American will issue a number devoted entirely to the wonderful Mid dle West region of the United States a number which will set forth broadly and lucidly not only

CIGAR BOOK FREE You Need It if You Smoke It tells you what you want to know about cigars. It brings one of our stores to your door. It tells you about all kinds of cigars. It makes it easy for you to find the cigar you like best. It tells you how we

$3 per Amnon'. TANDLER'S DRAWING AND UPSETTING POWER HAMMER., scientific american, 68-09-09

SCIENTIFIC INTELLIGENCE. One Pound of Coal per Horse Power. The Dublin Gas Works. Workmen and 'Mechanical Drawing., scientific american, 1871-10-07

Automaton Extraordinary. Instrument for Drawing an Oval. Steaming and Washing Colored Goods. MECHANICAL MOVEMENTS. Rectilinear from Circular Motion. Alternate Traverse In a Revolving Cy. Under. Discovery of Heentatinon. lee. Malleable Iron and Steel.

THE VIENNA SERUM INSTITUTE. Injecting the Virus Into a Horse. THE VIENNA SERUM INSTITUTE. Two Eggs a Day from a Hen. Drawing the Serum From a Horse., scientific american, 1907-11-16

A 'Nine-Year-Old' Earning His College Course few hours' work on Fridays and Satur this plan. More than 6000 boys do s $15.00 a week. You can start at once. ANY BOY willing to do a days can earn money by each week. Some make NEW BOOKS ETC. TWELVE

THE LOFTY PECOS VIADUCT ON THE SOUTHERN PACIFIC RAILWAY. BY DAY ALLEN WHALEY. THE LARGEST OF BEARS. MOUNTING THE LARGEST BEAR EVER KILLED. WEIGHT 1600 POUNDS. DRAWING THE BEAR'S SKIN OVER THE MODEL, scientific american, 1905-04-08

Eyelet machines. We can furnish the Latest Improved Eyelet Machines for making shoe eyelets and special eyelets of all descriptions. We are also builders and designers of Special Wireworking Machinery. BLAKE & JOHNSON M Exhibitors. Lecturers and Heal

HERON HUNTING. Kerite. HERON HUNTING—ORIGINAL DRAWING BY LITDWIG BECKMANNGooseberry Rats. Interesting Gun Trials., scientific american, 1892-11-05

NOVELTY ELECTRIC C 5th dk Locust stn. Philadelphia. rrio 'THE STEEL MANUFACTURERS Nat!. CALDWELLS CALDWELL'S SPIRAL STEEL CONVEYOR 131-133 West Washington St. Chicag III. New Catalogue of Valuable Papers THE CURTIS RETURN STEAM BOSTON MASS The STATUE

SEALED PROPOSALS. PARKER STEARNS & CO. 288.290 Sheffield Av. B'klyn N.Y. DIE MODELS SPECIAL NATIONAL S TAMPING AND ELECTRIC WORKS LEARN WATCHMAKING TheBall Transmission New York Model and Experimental Works INVENTIONS DEVELOPED SPECIAL MACHINERY 442

BEAUTIFUL HOMES. ELECTRICITY Care Hotel Bucklen ELKHART IND. WE MAKE OR PLATE ANYTHINC IN METAL 10:15 1038 1057 64 1071 1072 10S2 d 1 PRINTING TAUGHT FREE PROPOSALS. WANTED THE DR. WHITE ELECTRIC COMB CO Decatur Ill. NOVELTIES & PATENTED ARTICLES

Buy Telephones THAT ARE GOOD--NOT 'CHEAP THINGS.' WESTERN TELEPHONE CONSTRUCTION CO. 250-254 South Clinton St Chicago. HIGH GRADE Yigin. MACHINERY (Continued on page 189) WEBSTER MFG. CO. 1074 West 151h St. CHICAG Weber Gasoline Mine and Mill Pumps

A BRAKE FOR STREET CARS. 4AN IMPROVED ELEVATOR GATE. GOLDER'S DEVICE TO OPERATE ELEVATOR GATES. 414 A MARKER FOR WOOD-WORKERS. O'NEILL & REINHART'S WRENCH. AN IMPROVED WRENCH. TORMEY'S CORK-DRAWING DEVICE. LOVE'S MACHINE FOR LAYING OFF WOOD-WORK.,

INDEX OF INVENTIONS For which Letters Patent of the United States were Granted June 14 1887 Bating. W. M. Norris Mortises tool for squaring L. Hers 364687 365017 Drawing board N. W. Salsbury, scientific american, 1887-07-11

Everybody! IN THE WAY IN YOUR VEST POCKET SPECIAL OFFER NEW YORK CHARTER CHARTER GAS ENGINE CO. Box 148. STERLING ILL. ONKLIN S THE CONKLIN PEN CO. Toled Ohio. SELF-FILLING PEN WE MANUFACTURE THE MOTOR COMPLETE AND GUARANTEE EVERY MOTOR WE MAKE

CAPTAIN GALTON'S VENTILATING FIREPLACE. HOW GREENBACKS ARE CANCELLED. . IMPROVED WOOD SCREW. DRAWING AND SKETCHING—PRACTICAL HINTS AND RECIPES., scientific american, 1874-02-14

NOW READY. The First Prize of n Gold Medal awarded the ' Hammond ' at the Paris Exposition. THE HAMMOND TYPEWRITER Co. Trade IS YOUR LIFE SAFE AT HOME? cominimati SPIRAL SPRINGS. Circular Free. A SPECIALTYVOLNEY W. MASON & CO. PROVIDENCE. It.

Meat and Milk from Sewage Farms. ARCHIMEDEAN SCREW USED FOR DRAWING WATER. ORANGE TREE JACKET. BROWN'S ORANGE TREE JACKET. The Ruins of Ang-Kor Wat. ABCHIMEDEAN SCREW USED FOR DRAINING A MARSH., scientific american, 1896-06-13

several cylindrical sieves one within the other. provided with conduits so arranged as to deliver the proceeds con tinuously substantially as described. DRAWING WATER FR OM WELLS—C . Winegar. of Union Springs N. Y 1 claim the guiding of the bucket

EXTRAORDINARY PROGRESS OF AMERICAN INVENTIONS IN EUROPEJ Patents for the following inventions have recently been secured in England through the Scientific Ameri can Patent Agency further showing the great and daily increasing progress which American

Practical Receipts. Fermentation. Observations on Yeast. Brushes made of quills. New Method of making Chloride of Lime Manufacture of Sulphuric Acid without Lead Chambers. Hints for Pianists. Rouses of Unbttrnt Bricks. To make a Looking-glass appear

Saves 'The Underfeed is the ideal furnace the onlyfurnace Health I see no reason why on that score alone it should capacity economy and superior durability.' THE PECK WIILLIAMSON CO. DRAWING PENCILS 'c.Asrerz' color. ROTHAtiLER The Wrenchwith a Grip

3 Or the Philosophy of Charming. BY JOHN B. NEWMAN M. D. FASCINATION TO CORRESPONDENTS. Chapman's Drawing Book. FIRST VOLUME. AD FOR THE SCIENTIFIC AMERICAN. - PETER Cosa. - S. SANDS. RUFUs MERRELL. - SAFFORD & PARKS. CLARK SELLECK &WIRE SELLEEK.

The Doctor and Good Roads. Microscopic Drawing. THE WESTERN UNION TIME BALL SERVICE. WINDLASS AND ELECTRIC TRIPPING MECHANISM. THE WESTERN 'UNION TIME BALL TOWER. Hints for Boys. The Telephone in New York., scientific american, 1892-06-18

USEFUL FURNITURE BY SHERATON. USEFUL AND UNIQUE FURNITURE BY SHERATON. DRAWING TABLE How to Examine Water for Urea., scientific american, 1883-12-08

OLDSMOBILE OLDS MOTOR WORKS DETROIT U. S. A. Drawing Cory righted 1905. Road freighting Traction Mines Over zoo in use on Pacific Coast alone. Siberia Spain India Central America Sandwich Islands have them. Engines Ito Horse-power. Wood Coal or Oil

V DRAWING. MACHINES; MACHINES &c. SWIVEL HEAD ENGINE LATHES GAGE MACHINE WORKS. WATE RroRo.N.y. MUNN & CO. 37 Park Row. New York. MUNN .84 CO. 'Neu: Nor7. City. AND I R GUES., scientific american, 1871-12-23

A Rare Chance to Advertise. NEW MACHINERY AND INVENTIONS. To Advertisers. ENGRAVINGS. A. S. GEAR MACHINERY NEW and 2d-HAND.- WOODWORTH PLANERS American Cyclopffldia. New Revised Edition. Price and Style of Binding. OTIS BROS'. & C 25 Bond St'Newirork

Special Engine Offer B:ooks Mfg. C 404 Ship St. Saginaw Mich. $65.00 With the Merkel Spring Frame Motorcycle All Roads are Smooth Roads and Every Ride a Pleasure Ride THE AUTO-BI The Auto-Bi Company 1450 Niagara Street Buffal N.Y. MERKEL MOTOR CO. 28

COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS FOB IVEI1013 Letters Patent of the United States were Granted in the Week Ending August 8 1876 AND EACH BEARING THAT DATE. SCHEDULE OF PATENT FEES. $20 $30 $10 $15 $30 THE VALIDITY OF PATENTS. Back Page

MADE$105THEF1RST MONTH :nand. We teach Engines. The Hobart Electric Mt g. Co. 'rroy Ohio. WEL DRILLING Machines IROQUOIS MACHINE COMPANY GRINDING MACHINES WIRE DRAVMNG MACHINERY 24 YEARS ; SANITARY UNDERWEAR os ONLY TRUE SPECIAL LIGHT WEIGHTS FOR

BLAKE'S CHALLENGE' ROCK BREAKER. NEW YORK BELTING & PACKINC CO. RUBBER BACK SQUARE PACKING. (FLAT AND SWIVEL BASES.) SOLID JAWS; STEEL-FACED OR SOLID STEEL in BIEN 266th EDITION. PRICE ONLY $1 BY MAIL POSTPAID. KNOW THYSELF A Great Medical Work on

Lubricating Journals. Bed Lounge. Spring Seat for Chairs Cars etc. Umbrella Stand for Church Pews. Wash Boiler Attachment. Car Axle. Spinning and Drawing Frame. Portable Balcony. to its adheeivelleal ell the wall Die for Forming Basile of Lockets.

304 SCIENTIFIC AMERICAN. Alternate Motion. The Pantagraph. 'W pod Vinegar. Artificial Light. TRIO ART OF PAINTING. TRANSFERRING PRINTS. IMITATION PAINTING. Purifying Water. Cheap Carpeting. Phot agent° Drawing. Pass it Round. SCIENTIFIC AMERICAN: BY

APPARITION OF A DRAWING ON WHITE PAPER. The Boiler Batteries at New Orleans. What Fossils Teach. 4 IMPROVED DREDGER. MAGICAL Scotch Dredges for the Panama Canal. MAGICAL APPARITION OF A DRAWING ON WHITE PAPER. IMPROVED HYDRAULIC DREDGER maw,

East 62d Street - NEW YORK 14Jibvertizements. ORDINA RY RATES. Inside Page. each insertion75 cents a lineSENECA FALLS MFG. COMPANY Lathes Foot THE CURTIS Water Pressure Regulator D'ESTE & SLY CO. 29=33 Haverhill St. Boston. :THIN STEEL 0 0 :TRY

Scientific American COLD GALVANIZING. SLEEP NICKEL OHS Until you have heard Amberol Records you have not heard the Edison Phonograph at its best WILL YOU SELL MYRICK SYNDICATE Springfield Massachusetts DRAWING PENCILS. Made in 16 degrees. 6B to 8H

Breech-Loading Shot Gun. Adittrtionnento. Back Page each insertion - 51.00 a line. 'This Work is Very Reliable and is Strongly LLENS USEFULCOMPAN I ON LIGHTF LNATIONS 17. PARK PLACE N.Y SHEET METAIL DRAWING PRESSES Lathes Planers Shapers The George

ACETYLENE SEARCH LIGHTS THE CARLISLE & FINCH CO. new Button THE BEST THING YET! 85 Commercial Avenue NOW READY. Horseless Vehicles Automobiles and and 'Mechanical Movements Devices nod Appliances.' Illustrated. MUNN & CO. 361 Broadway New York

APRIL 26 18901 The Cheapest Light. A Problem Defying Solution. AN IMPROVED DRAWING KIT. AN IMPROVED MUSIC LEAF TURNER. KYLE'S LEAF TURNER. THE SPRINGFIELD INDUSTRIAL DRAWING KIT. Damage to Adjoining Structures from Heavy Buildings. Battery Lighting.,

Battle Creek. Mich. $1200 FAIL T MAKE MONEY WIRE-DRAWING MACHINERY S. HEALD & SONS Send for prices etc. Barre Mass. Baker Rotary Pressure Blower. Warranted superior to any other. WILBRAHAM BROS. 2818 Frankford Ave. PHILADELPHIA. 174 ELM STREET

THE WEBB ACADEMY AND HOME FOR SHIP BUILDERS. THE WEBB ACADEMY AND HOME FOR SHIP BUILDERS. WEST FRONT OF BUILDING. SOUTHEAST ASPECT WITH CORRIDOR. ONE OF THE DRAWING ROOMS. PORTRAIT OF THE FOUNDER. THE MUSEUM—SHOWING THE DUNDEREERG'S MODEL. THE

THE ONLY NAPHTHA LAUNCH. GAS ENGINE AND POWER COMPANY 185th St. Morris Heights New York City. Bundy Steam Trap. ARE YOU SAVING ONE DOLLAR A DAY 9.0vertizements. ORDINARY RATES. Inside Page. each insertion . 73 cents aline SATIN JUNIOR. THE NEWSPAPER

COLD GALVANIZING. 'fl + CONCRETE HOUSES LVFKIN RULE CO. Saginaw Mich. U. S. A. filgh Wheels Travel all Roads Because all Roads are made to be traveled by High Wheels. HolmanAutomobiles Low Fares to Seattle CHICAG RAILWAY L F. A. MILLER General

postpaid with catalogue of 8000 CONSECUTIVENUNBERER Numbers up to 100000 sarne price. ROBT. . INGERSOLL & BRO. Buy Telephones $4000 THIS Adjustable DRAWING Table delivered in United States for 68.00 each. Is easily adjusted firm and ADJUSTABLE

PERFORATED METAL AND FOR ALL 'USE S.the World's ighting Ships FRED T. JANE THE FOURTH ANNUAL EDITION NOW READY. RUDOLF AtOSSE Cologne Germany. H. P. GAS ENGINE CASTINGS J. L. 70460 BERLIN S. W. GERMANY. NIIMIMm NEW DOMESTIC A.B.SEE ELECTRIC ELEVATORS

Week Ending December 28 1889. Price 10 cents. For sale by all newsdealers. Estimation of Silica.-By GEORGE CRAM.-A new by the action of hydrofluoric acid.-A very ingenious contribution ter national and local roads peculiar features of construction

MOSSBERG ROLLER BEARINGS MOSSBERG & GRANVILLE MFG. CO. Providence ROLLING STAMPING PUNCHING AND WIRE DRAWING MACHINERY. deavors to show that the luminosity of hydrocaffi on flames is due to the localization of the heat of formation of acetylene in

THE CITY OF NEW YORK (5) Years. from August 1 1906. JOHN McG: WOODBURY Commissioner of Street Cleaning Learn Telegraphy and R. R. Accounting MORSE SCHOOL OF TELEGRAPHY MASON'S NEW PAT. WHIP HOISTS Manfd. by VOLNEY W. MASON CO. Inc. 'THE FOUR-TRACK

The Drawing Frame. Zorreeponbence. A New Comet. The Famine in India. Bacteria in Hailstones. A SUBMARINE SEARCH LIGHT. The Trolley Electric Car. Professor Carl Schorlemmer. SEARCHING FOR SUNKEN GOLD NEAR HELL GATE NEW YORK., scientific american,

tirntific Literary Notices. G ;1 AMUEL MeEL01' CIVIL ENGINEER VLECTRICAL APPARATUS—ON RECEIPT ANETALLIC LETTERS AND FIGURES MODELS MADE AT JOHN STOKELLS' ITAIIRISON'S 30 INCH GRAIN MILLS QECOND-HAND MACHINISTS' TOOLS IVEW HAVEN MANUFACTURING CO

Used 18000 feet 'Temporary Rubber Roofing.' RUBBER ROOFINC. BAIRD'S BOOKS FOIL PRACTICAL MEN HENRY CAREY BAIRD & CO. 810 Walnut Street Philadelphia Pa. For u n I PULLEYS THE STEAM ENGINES. Dredging Machinery Flint Mill Machblery Tur bine Water

SCALES Small Printing Presses! Steel Casting's EVELINA STREET PHILADELPHIA PA. ary outlays for Faints Roofing PURE UNDILUTED PAINTS. FULL BODY AND FULL U. S. STANDARD MEASURE. ASBESTOS ROOFING With WHITE FIREPROOF COATING. Asbestos Boiler Coverings.

BURNS ELECTRICITY. the Chloride THE ELECTRIC PORTABLE LAMP CO. NORTH-UNIONST. Egowitia Cem ALL PURposES CHICAGO ILL.U.S.A. KEUFFEL & ESSER CO. Drawing materials EXPERIENCE I gine Patents. CHARTER GAS ENGINE CO. Box 148 Sterling III. PRIESTMAN & CO.

Drawing and Designing; Lettering; Chemistry; Telegraphy; Telephony; Teaching; Stenography; Book-keep CORRESPONDENCE SCHOOLS Bor.942 SCRANTON PA. WATERPROOF GLUE CASEIN COMPANY OF AMERICA ACETYLENE WALTHAM WATCH ES The best and most reliable

New Edition of the Patent Lows. shall continue to furnish them for 121-2 cts. per copy. AD American and Foreign Patent Agency. manutactured Mathematical Drawing Instrutnents of IRON FOUNDERS MATERIALS—viz. fine, scientific american, 1851-08-09

Stone working machine Field & Pratt61'7742 Straw stacker. pneumatic J. W. Nethery 617475 Straw stackers centrifugal discharger for F. F Landis 517524 Street. sweeper . B. Tilton 517709 Stuffing box Ir. G. Williams 517569 Surgical ligature bolder H.

YOUR OWN ELECTRIC LIGHT PLANT. Don't Strop YOUR RAZOR Just lather and shave with a Gillette. TheGillette Is the or lightshaving and each blade will all blades asceptic and none resharp 12 blades $5.00 ; Standard Combination 10 Double-Edged Blades 50

NOVEMBER 12 188 ientific 1ntrrican. UPT1TRE PRACTICAL DRAUGHTSMAN'S Book of Industrial Design MACHINIST'S AND ENGINEER'S DRAWING COMPANION. THE AMERICAN BELL TELEPHONE COMPANY AMERICAN BELL TELEPHONE COMPANY 95 Milk Street Boston Mass. THE BEST BAND

European Representatives of American Houses. with First-class Agents in the principal industrial and agricul tural centers and cities in Europe. London 7 Poultry E. C. Paris. 8 Pace Vendome. Terms on application. J. R. W. & Co. purchase Paris goods

Emery & Corundum Iii.71-3MMIA I AND CRINDINC MACHINERY 30 to 300 Horse Power. Send for Illustrated Circular and Reference List ASH OUR PRICES! Water Power. THE WESTINGHOUSE MACHINE CO. PITTSBURG PA. ROOFING. OPTICAL METEOROLOGICAL MATHEMATICAL

A RMSTRONG'S For the Pictorial and Literary Presentation Of the Events of the Day Harper's Weekly TAKES THE LEAD. In addition to its many other attractions Mina trated records of the achievements in . 'SCIENCE AND ARTform a notable feature. During

BOOKLET THE NEW YORK STANDARD 'CHRONOGRAPH For Laboratorial Work. Experi mental Work Photographic Purposes Electric and Tele phone Usages. For Refiners and Compounders of Oils etc. For Physicians. Surgeons and Nurses and for the Exact Tim ing of all

DRAWING. Electrical Stationary E Lini G Textile ARCHITECTURE. TELEPHON TAUGHT BY CORRESPONDENCE Co mpendium of Drawing ONE THOUSAND ILLUSTRATIONS OR TWO MONTHLY PAYMENTS OF $3 EACH By Express Prepaid. Money AVT HORS OF TREATISES IN THE WORK. SIZE OF

Waist L. S. Biggar Washboiler cove! A. R. Thomas 7992 Washing machine A. W. Smith 799006 Watch stem winding and setting W. E Porter 7990E7 Water apparatus for electrically purifying Water closet chair and flush tank sanitary Thompson & Shehan 799418

As a competent Illustrator de signer or cartoonist you can com mand $20 to $100 a week or run an independent-studio and work THE ACME School or Drawing How to Construct An Independent Interrupter Wireless Telegraph Outfit.' Besides making all kinds

Address ADAMANT MFG. CO. 309 E. Genesee Boston Mass. Barnes' Foot-Power Machinery HOLIDAYS. Mechanical Drawing Self-Taught.-Comprising The English and American Mechanic. - An Every Man HisOwn WI echanic.-A Complete perb S. P. Langley. ASugar

PRINTS. 'address Brum & Co. 301 Broadway New York. THE BEST CLIP EVER MADE.Cement Books. 51c LD.VevelZIrgatnelSVMe5g: ENGINEER'S LICENSE GEO. A. ZELLER Publisher 68 S. Fourth Street St. Louis Mo. NOVELTIES & PATENTED ARTICLES Grey Iron Castings

SHAFTING PULLEYS HANGERS. IMPORTANT BOOKS SHEET METAL WORKERS. Galvanized Iron Cornice Worker's Manual HENRY CAREY BAIRD & CO. 810 Walnut Street Philadelphia Pa. Prof. Chas. F. Chandler Ph.D. Amateurs or Professionals ROOFINC. ' VULCAN ' Cushioned

been reduced to the requisite size it is flattened by drawing it from one reel and winding it upon another and passing it between a pair of pressure steel rollers. After this the flattened wire is next hardened and nature and object to the hardening

WORK SHOPS MACHINERY W. F dt JOHN BARNES CO. % 2d Floor. Wilshire. Cleveland 0. PLENTY OF RUNNING WATER THE PETTYJOHN CO. THOUSANDS OF SATISFIED USERS 1907 Sales Over $600000.00 Repairs Average Under $3.00 per Month THE HOLSMAN AUTOMOBILE CO. THE

AND ACHINISTS' & ENGINEERS' Drawing Companion. II ROOFS. ICHARDSON MERIAM & CO. la Manufacturers of the latest improved Patent Dan 300 The carer Po wer. OLD ROLLED SHAFTING. The feel that this Matting nee a per cent greater Strength a Mier finish and

THE TRANSPORTATION OF LARGE CABLES. SCIENTIFIC AMERICAN. Fast Railway Speed. American Art Products in Germany. Prune Rust. TRUCK FOR CARRYING A CABLE SPOOL. HORSES DRAWING THE CABLE SPOOL., 1895-06-01

Coloring of Flowers by Absorption. The Locomotive Whistle. Novel Spectacles for Near-sighted People. Drawing in the Workingmen's School of Berlin. BY G. BABOWSKL Dollar Weights and Measures. Dangers from Impure Water. VIP 4A New England Manufacturing

POWER8c FO I SHAPERS.PLANERSDRILLS. SE A IAN LAT E 0.1 0 CULVLNT ST. CINCINNAT I. u. TAPPING MACHINE HARVEY HUBBELL 875 State Street Bridgeport Conn. THE CURTIS EsT E & SEELEY CO. IlacDillos. Hill Clarke & Co. 160 Oliver Street. BOSTON. The

stamp for circular of other novelties. KNAPP ELECTRIC & NOVELTY C course in mech. drawing at Rockton Corrmo. School of Mech. Engineer'g. Little Fall's N.Y. B.703 will make you a proficient draughtsman Ideas Perfected and . C. SEV I . 181 Madison St

YOUNG MAN LEARN SPANISH SCREW-CUTTING DIE HEADSHAWKINS NEW CATECHISM OF ELECTRICITY the typewriter Excbange The Berkefeld House Filter. Manufactory Established 1781. Manufactory Established 1781. DRAWING PENCILS COPYING 121 West Houston Street New

TO INVENTORS INDEX OF INVENTIONS For which Letters Patent of the United States were Granted MAY 18 1897 AND EACH BEARING THAT DATE. ORDINARY RATES. Inside Page each insertion -75 cents a line the iniltvaukee Water Elevator (OR HYDRAULIC MOTOR). For

TROUVE'S AVIATOR. The Art of Drawing. Scientific Hydraulic Gold Mining. Fig. 1TROTJVA'S AVIATOR. 0. 4, scientific american, 1892-02-13

DEVICE FOR NDING RAILROAD CAR WHEELS ON OR OFF THE TRACK DRAWING OR PROPELLING BOATS BARGES RAFTS AND OTHER SIMILAR NEW PUBLICATIONS. -4 Inventions Patented in England by Americans., scientific american, 1867-02-09

used in process ? A. Best letterpress ink. 3. Can ink be rubbed from pad as in the ordinary copygraph ? A. No. chemical which will render rope or cloth incombustible or partly so ? A. Saturate he fibers with a solution of 1 lb. crude tungstate of

IMPROVED FEATHERING PADDLE WHEEL. Experiments with Disinfectants. EMERSON'S FEATHERING PADDLE WHEEL. . Wooden Ties in Stone Edifices. The Importance of Drawing. TIIRTON'S COMPENSATED SPRING SAFETY VALVE., scientific american, 1873-01-18

Classified Advertisements BUSINESS OPPORTUNITIES PATENTS FOR SALE. HELP WANTED. FOR SALE. MOTION PICTURES. BOOKS AND MAGAZINES. HOUSEHOLD NEEDS. ASTRONOMY. EDUCATIONAL. PHOTOGRAPHY. DEAFN ESS. WATtER FILTER. GRE-SO LVE NT. OLD COINS AND STAMPS. The

Paint that Pleases DIXON'S SILICA-GRAPHITE PAINT JOSEPH DIXON CRUCIBLE CO. Jersey City N. J. THE ' QUEEN ' DRAWING PENS. SCIENTIFICALLY SHARPENED. RI=3191MillITEIMIN 644.141.100 408010010OOMOOOOOla DESIGNS. R.H.I Tsai& Bm PERFECT- PUMP - POWER. TABER

DRAWING INSTRUMENTS! Philosophical and Chemical Apparatus. PHILAD'A. Dwellings & Country Seats Delantater Iron Works New York U. S. A. TIN SIBLEY & WARE. South Bend Indiana. SPECIALTIES: 19i INCH DRILL PRESSES AND GEAR CUTTING. PRICES REASONABLE.

amide Page each insertion75 cent a line 2000 Fine Black copies of Writing Drawing. Music SUPERIOR Stationary Engines 0.gontt ROCK DRILLS AIR COMPRESSORS BOILERS HOISTS 10 PARK PLACE N.Y. ELECTRIC LIGHT AND POWER. SEBASTIAN MAY& CO's Improved ncror

N. Y. CAMERA EXCHANGE. N. Y. CAMERA EXCHANGE 4 Fulton St. NEW YORK the Scientific American PUBLICATIONS FOR 1901. RATES BY MAIL. DESIGNS. TRADE MARKS. LABELS. PRINTS. MARVELOUS I Glasses An Exquisite Gift Hoeheater N. Y. NEW YORK CHICAG THE s QUEEN '

Pure Air and an Even Tempe rature throughout a Room. MACHINERY OF EVERY DESCRIPTION GEORGE PLACE Cotton Seed Huller. Steel Castings LINA STREET PHILADELPHIA PA. J. E. BUERK P. 0. Box 979 Boston Mass. PNIA.Y1 LEHIGH EMERY WHEELS. BRADFORD MILL C

Drawing Steel Tubes. Effect of Alcohol upon the Gastric Secretions. The Weight of Iron and Wooden Masts., scientific american, 1864-04-16

Trti of Steam Canal Boats on the Erie Canal in Competition for the State Reward of One Hundred Thousand Dollars. Improved Head Band. Improved Chandelier Center. Improved Revolving ' Fire Arm. Improved Spring Rocking Chair. Improved Reel for Skeining

IVIachinery. UNITED STATES WATCH CO'S WATCHES REPORT OF JUDGES GILES BRO. & CO. GILES WALES & CO. Ask your Jeweler to see the MARION TERMS FOR 1872. CLUB PREMIUMS. MUNN & 37 PARK ROW NEW YORK AIRD'S Blechanical DRAWING. Milling Machines. PATENT

DESIGNS PATENTED. CANADIAN PATENTS. 2k4vtritstments. Back Page81.00 a line. Inside Page 75 cents a line. MICROSCOPES. The Commercial Agency. MCKILLOP & SPRAGUE CO. and State Banks. Name and Address of every Private Banker. A Complete List of all the

THE ELECTRIC PORTABLE LAMP CO. Drawer 13 Deer Park ON THE CREST OF THE ALLEGHANIES. SEASON OPENS JUNE 21st 1897 SUPERB HOTEL AND COTTAGES. EXPOSITION. Closes October 16th 1897. Pittsburg is the greatest industrial centre in the United States and the

Little Things that Count. NOVEL FINGER RING GAUGE. NEW RING GAUGE. IMPROVEMENT IN THE ART OF SHAPING SHEET METAL. ELECTRICAL DRAWING DIES. The Atmosphere of the Sun. Volcanic Silver. DEWEY'S IMPROVEMENT IN METAL SPINNING., scientific american,

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