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TION OF STANDARD TIME. DIAGRAM SHOWS RETICLE OF TRANSIT. HOW WE GET STANDARD TIME. BY HARLAN T. STETSON. The Destruction of Rats with Carbon Disulphide. STANDARD TIME BELTS OF THE UNITED STATES., scientific american, -1909-10-02

BARKER MOTORS Have moregood points fewer THE MIDGET DYNAMO OR MOTOR Price as shown $7.50 Without Hand Power 84.50 The Genuine Armstrong's STOCKS and DIES B. F. BARNES MACHINE TOOLS B F BARNES CO. - Rockford. III. ORIGINAL BARNES Nal- Upright Drills

Exposed plates removed posed. 'The only Magazine Camera with Bulb Shutter. All Live Dealers Sell Them. $8.00 10.00 1899 Catalogue with complete Information—FREE. for ALL PURPOSES. ROCHESTER W. E. CALDWELL CO. mon citsEsixd IAMCiAmPiALLITA512,

SIMPLE APPARATUS FOR PHOTOGRAPHING THE SPECTRUM The Work of the School of Athens at Corinth. SIMPLIFIED APPARATUS FOR SPECTROSCOPIC PHOTOGRAPHY. SOME CURIOUS AUTOMATA. INTERIOR OF VAITCANSON'S AUTOMATIC DUCK. SPECTRUM OF ALUMINUM. Queen Victoria's

DANN & LAPP'S LONG DISTANCE TELEPHONE. THE ACME AUTOMATIC SAFETY ENGINE WITH BRYANT'S PATENT BOILER., scientific american, 1886-09-18

WEEKLY. Cullum Memorial Hall 1898. Battle Monument. Gymnasium. 1891. Bird's eye View of Grounds and Buildings, scientific american, 1900-06-23

Coal or Oil–An Early Suggestion from the Founder of the Guion Steamship Line. Prizes for Photographs. The Current Supplement. An Odd Method of Heating Cars., scientific american, 1902-06-28

How to Cast sugar Candies. Effects of the Earth's Rotation. Fresh Water Apparatus. Machinery Wanted for Texas. FOREIGN SVEXAR Y., scientific american, 1865-10-07

Winston Churchill serial its Gibson Remington and Frost pictures we want you to see also what a full month of Collier's means. We will send you for twenty-five cents (the regular price of the Christmas Number alone) that wonderful Holiday issue and

The Panama Canal. RECENTLY PATENTED INVENTIONS. Engineering. Railway Appliances. Mechanical. Miscellaneous., scientific american, 1894-11-11

CANNONADING OF OIL TANKS. NAVIGATION IN FOGS. PROFESSOR MAYER'S TOPOPHONE. EFFECT OF AGE ON THE QUALITY OF IRON. A COLLISION BETWEEN LARGE PASSENGER STEAMERS. Honors to an Aged Chemist. Perseverance under Difficulties., scientific american,

YELLOW AND RED PHOSPHORUS IN THE MANUFACTURE OF HATCHES. Hydraulic Pumping on the Comstock. Iron Tops not a Protection for 0 Tanks., scientific american, 1880-08-28

95 k Street Boston Mass. desire relief I can furnish a means of Permanent and Pos itive Cure. A Home Treatment. Hard Rubber. 33 Mercer St. Nework. Estimates furnished and correspondence solicited. OOFINC. Agents% anted. T. NEW 82 John Street New

scientific american, 1868-06-11

Cleaning Engravings. TEE USE 02 AMMONIA IN BAKING POWDERS AND ITS IMPORTANCE AS A CULINARY AGENT. 4'IThe Sultan of Turkey., scientific american, 1882-05-27

THE SCIENTIFIC AMERICAN SUPPLEMENT. Back Volumes of the Supplement. INDEX OF INVENTIONS States were Granted AND EACH REARING THAT DATIL, 1884-12-06

T THE SCIENTIFIC AMERICAN. THE GEOGRAPHY OF CONSIIMPTIONConsumption deserves attention., 1860-01-28

The Whitening of Wool. Dr. Crerar's Cure for IniluenZa. The Earth an Outer Shell with a Fluid Filling. Walter A. Wood., scientific american, 1892-02-13

Science Notes. Miscellaneous Notes and Receipts. Perfumed Ammonia Scouring WaterPerfumed am glossy. —FArben Zeitung. PATRICK COUNTY FA. AND ITS CURIOUS ' FAIRY STONES.' BY POWHATAN BOITLDIN. which some Indian sculptor had made of that material ;,

TO INVENTORS. INDEX OF INVENTIONS For which Letters Patent of the United States were Granted January 7 1896, scientific american, 1896-01-18

A WEEKLY JOURNAL OF PRACTICAL INFORMATION ART SCIENCE MECHANICS CHEMISTRY AND MANUFACTURES. Vol. XXVII.a.a.No. 22.1 (CIGAR MAKING. CIGAR )IAKING. Steam Street Car. Krupp' s Steel 'Works., scientific american, 1872-11-30

New Mechanical Inventions. A Telephonic Alarm., scientific american, 1878-02-09

PATIENCE AND PERSEVERANCE IN INVENTION. Building Edition of Scientific American. Export Edition of the Scientific American (Established 1878) Contents. SCIENTIFIC AMERICAN SUPPLEMENT No_ 1068 For the Week Ending; June 20 1896. PAn It roap.-4

MARIA MITCHELL. The names of women who have gained fame in art in literature and in advancing woman's work are numerous and well known. Science has its followers among.the gentler sex but among them the name of Maria Mitchell stands out clear and

A WEEKLY JOITRNAL OF PRACTICAL INFORMATION ART SCIENCE MECHANICS CHEMISTRY AND MANUFACTURES. r$3.00 A YEAR. WEEKLY. MOVING THE CENTRAL DRAW SPAN OF SEVENTH AVENUE BRIDGE. MOVING THE DRAW SPAN OF THE SEVENTH AVENUE BRIDGE NEW YORK CITY., scientific

Sell at sight. Descriptive Circular free. For Terms to Agentsetc. address ASTHMA REEDY positive guarantee. Price $1.00 perBeadfarchnlarT.P.T.P.B. Co.328 TAIre.B.T. THE BAKER BL ROWE. . WILBRAHAM BROS OUR CATALOGUE. VS wcwa. heavy Punches Shears

EIGHTY-TUN CRANE AT WOOLWICH EN The Youngest VolCano. Steel Bronze. THE THE PODOMETER OR WALKING DISTANCE INDI CATOR. LAND., scientific american, 1875-08-14

Purchase Exposition The Largest Dynamo in the World OF SEPTEMBER 10 ST. LOUIS FAIR MUNN 8). CO. ALL ARTICLES FULLY ILLUSTRATED Launches Valves Specialties. Hand Winder THE IDEAL COMPANY Kenosha. Wisconsin U. S. A. Cars Large Contracts Pope

Declined., scientific american, 1871-10-11

SOARING FLIGHT. surface are retarded by friction and piled up thus de SCIENCE NOTES well-known phenomena., scientific american, 1904-04-30

Improved Vibrating Propeller. Improved Wheel Plow. Improved Cooking Stove. Improved Car Coupling. Improved Wood Sawing Machine. Improved Vibrating Propeller. Improved Auger. Improved Automatic Pumping Engine. Improved Railway Switch. Improved Well

Sanitary Inventions in House Building. 4 SOrAn Easy Test for Olive Oil. Salicylic Acid for Bee Stings. Testing Brain Pipes. Ripening Melons Underground. OH of Coffee., scientific american, 1881-02-19

Inventions Patented In England by Americana. 41. PATENT OFFICE DECISIONS EXTENSION NOTICES., scientific american, 67-03-16

SUPERPOSED TURRETS KENTUCKY AND IfFARSARGE. VULNERABILITY OF THE SUPERPOSED TURRET. A New Weaving and Dyeing Process. The Current Supplement. RECORD PRACTICE OF CRUISER 'TERRIBLE' PLOTTED OVER SUPERPOSED TURRETS., scientific american, 1901-08-24

CIENTIFIC MERICAN Vol. LXXXVIE—No. 13., scientific american, 1902-09-27

DESIGNS COPYRIGHTS Act. Anyone sending a sketch and description may 50 YEARS EXPERIENCE. How to Build a Homelbs- 'The Scientific American Building Edition.', 97-09-11

PUBLISHED WEEKLY AT 0. D. MUNN. A. E. BEACH. THE ARCHITECTS AND BUILDERS EDITION OF THE SCIENTIFIC AMERI ANOTHER BILL TO DISCOURAGE THE INVENTOR AND FAVOR THE INFRINGER. iCierr.A.131ISI-IEL) 1845. SCIENTIFIC AMERICAN SUPPLEMENT No. 892. For the Week

NEW TYPE OF SUB-SURFACE TORPEDO BOAT. A smaller 45-foot boat of this type is now being built for trial by the government. TWENTY-FIVE-KNOT SUB-SURFACE TORPEDO BOAT.Artificial Camphor., scientific american, -1909-04-10

beermachine it is clear and palatable but I cannot get can probably be brought aboatby the addition of sugar. In the trimming of saddles in Texas A. The coloring matter is one Of the fast aniline yellow dyes known under the name of naphthol. They are

THE ADVOCATE OF INDUSTRY AND JOURNAL OF SCIENTIFIC MECHANICAL AND OTHER IMPROVEMENTS. VOLUME 6. NEW-YORK JUNE 21 1851. [NUMBER 40. WADE'S PATENT SPARK ARRESTER.Fig. I. THE Scientific American CIRCULATION 18000. PUBLISHED WEEKLY At 128 Fulton street

Phosphorescence and X Rays in the Geissler and Crook es Tubes. By F. Campanile and E. Strome' in the English Electrical Review., scientific american, 1896-08-29

Tyrotoxicon in Cheese and Milk.Salt as a Preservative. WORK OF AMATEUR ELECTRICIANS. Ingrowing Toe Nails—Their Treatment and Cure. Dynamic Power of the Sea. -J, scientific american, 90-09-13

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

Experiments in Feeding Sheep. Lot 1 so a change of ration became imperative. War Ship Charleston. The motive power of the Charleston is furnished by two horizontal compound engines which are placed in Curculio and Chinch Bugs. IThe American Institute

of reading matter. Scientific American contained n pages of reading matter. MUNN 6 CO. Publishers 361 Broadway New York PALMER BROS. Cos Cob Conn. MORAN FLEXIBLE JOINT for Steam Air or Liquids. Moran Flexible Steam Joint Co Inc'd SENT ABSOLUTELY ON

Importance of Well Seasoned Timber for Carriage Building. CHEMICALS AT THE CENTENNIAL. THE AMERICAN SOCIAL SCIENCE ASSOCIATION. II0 80, scientific american, 1876-09-23

$3000 down hill COLD -GALVANIZING. AMERICAN PROCESS. NO ROYALTIES. NICKEL Co. Newark. N. J. Writing Machine NEW MODELS io and ii NOW READY MODEL 10 MODEL II Write for It today! FROM FACTORY TO USER HOOSIER STOVE FACTORY. 2S7 State St. Harlan Indian's

vision of the Aermotor and Towers. ROCK DRILLS AIR COMPRESSORS Astronomical Telescopes PURE CONDENSED MILK IDE AND IDEAL AUTOMATIC ENGINES. WF UR ITMYER PATENT F NACE. I BOILERS OF EVER V DESCRIPTION. Every One Guaranteed. KIRKWOOD MILLER & CO. 16

Reynolds into a triangular controversy. While he contented himself with disagreeing with Reynolds in many points he 40 44 04 SLADE SUSTAINED So ow THE LEVERRIER OF CHEMISTRY., scientific american, 1876-11-18

FAMILY on an NEW PRICES ON The Standard of the World. 1897 COLUMBIAS 1896 COLUMBIAS 1897 HARTFORDS HARTFORDS PATTERN 2 HARTFORDS HARTFORDS POPE MFG. CO. Hartford Conn. ORDINARY RATES. 'Search=Light' Always Bright. Bridgeport Brass Co.

0, scientific american, 1867-02-02

$4, scientific american, 1860-05-12

Ventilating Horse Cover Great Military Combinations. The Constitution of Steel. Lighting Gas by Page's Induction Coil. PERRY'S VENTILATING HORSE COVER., scientific american, 1865-04-08

Improved Bead-Stroke Hammer., scientific american, 1866-12-08

Knowledge is Power. Birds' Nests. Waste in Machine Shops. Employers and Working Men. . 40., scientific american, 1877-06-23

Improved Corn or Seed Planter. AMERICAN CAST-EEON ORDNANCE. lERELL'S CORN OR SEED PLANTER., scientific american, 1864-02-13

scientific american, 1859-07-30

Vol. CNo. 19. 83.00 A YEAH. The two cars—one ascending the other descending—in mid-air. Showing the glaciers below. THE ELECTRIC AERIAL MONO-RAIL UP THE WETTERHORN[See page 353.1, scientific american, -1909-05-08

THE SEA GULL. Feathers. Progress of Railroad Building. THE GLEANERS OF THE SEA., scientific american, 1876-10-14

How the Brain Works. RECENTLY PATENTED INVENTIONS. Mechanical Devices. Miscellaneous Inventions. POTATO-BUG DESTROYER Christian Designs., scientific american, 1898-0

AQUARIUMS FOR AMATEURS. California Fruit. The Lowest Record in Working Gold Ores. AQUARIUMS FOR AMATEURS., scientific american, 1887-11-26

Grenadier of the 2d Queen's Regiment 1687. Various Types of Grenade Badges in the British Army. 4 I GRENADES AND GRENADIERS., scientific american, 1905-09-02

Figure 1. Cotton Press. Raising and Lowering Tops of Carriages. Improved Eye for Mill-Stones. Improvements in Papier Mache. Improvement in Shafts of Water Wheels.1 Spring-Space for Compositors. The Quadrature of the Circle. WATER-SAVING OVER-SHOT

THE GANZ SYSTEM OF ELECTRIC CANAL HAULAGE. 'HOME MECHANICS FOR AMATEURS.' THE CURRENT SUPPLEMENT. neering notes are also published SCIENCE NOTES., scientific american, 1903-10-31

Issued by the United States Patent Office OFFICIAL REPORT OF, scientific american, 1868-05-30

Alloys of Manganese. 400 Rapid Tanning with Formaldehyde., scientific american, -1909-05-01

The new Pennsylvania railroad station, New York City. Scientific American, 1906-05-26

Lowering hue Axis Support on fli Equatorial Dome in the Distance. The Masonry Piers. THE NEW ASTEROID CAMERA AT THE UNITED STATES NAVAL OBSERVATORY, scientific american, 1904-11-26

scientific american, 1865-06-24

scientific american, 1866-12-22

Manufacture of quills for Writing. Practical Receipts. Method of removing the Stains of M trate of Silver or Indelible Ink. Copying Paper. Tracing Paper. To Distinguish Oxalic Acid from Epsom Salt. Rule to Calculate the Horse Power of an Engine.

WEAK SPARKS. WORKING MEN'S READING ROOMS. THAT OBNOXIOUS POSTAL LAW. MECHANIC INVENTOR AND ARTISAN SHOULD BECOME A PATRON OF THE SCIENTIFIC AMERICAN., 1875-12-18

THE NEW SCYLLA AND CHARYBDIS. BY H. C. HOVEY., scientific american, 1881-10-29

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.

the Fall of 1850. The Circuit Court. in the Eastern Circuit held at Boston on the 24th Feb. before his honor Judge Sprague decided after a long and te chine does not infringe the Woodworth Patent ; this was on a motion forapermanent injunction which

SIMPLE METHOD OF IMPROVING THE HEALTH OF CITIES. CARBONIC ACID IN THE SOIL.' 4. STEAM ON THE FARM. EUROPEAN STREET CAR IMPROVEMENTS.0. NEBRASKA PATENT LAWS., scientific american, 1873-04-12

MERICAN1 Vol. XCIXNo. 10.1, scientific american, 1908-09-05, the Mari-Kanave dam in Southern India

The Roman Baths at Bath England. Leather. Glucose vs. Cane Sugar and Sorghum. Gilding Leather. uni 1., scientific american, 1883-11-24

EXPERIENCE PATENTS' TRADE MAIRICS DESIGNS COPYRIGHTS &C. Scientific Rtnerican THIS BOOK FREE T SUBSCRIBERS THE EUREKA CLIP 'FOLLOW THE FLAG' ST. LOUIS and CHICAG New York. Boston St. Paul and Minneapolis, scientific american, 1906-01-27

NEW YORK SATURDAY MAY 20 1865. Content.: SALT AS A FERTILIZER. THE LENOIR GAB ENGINE. FOOT-POUNDS OF WORK. A UNIT OF HEAT AND SPECIFIC HEAT. CHEAP SOLVENT FOR GOLD., scientific american, 1865-05-20

LUCIUS W. POND MANUFACTURER RELIEF P Nor Newspaper Book Fif:)TOZNGRAITING 62 Courtlandt Street. ustrationa THREE PLY ROOFING In Use Ten Years. B. STURTEVANTPATENTEE AND SOLE MANUFACTURER OF PRESSURE BLOWERS & EXHAUST FANS 72 SUDBURY STREET BOSTONMASS

IMPROVED HORSESHOE CLINCHER. TER. IMPROVEMENT IN WINDOW SASHES. Strawberry Worms., scientific american, 1869-07-03

scientific american, 1872-07-13

Standard Automobile Co. F. A. LaRoche Co. Alexander Fischer E. B. Gallaher Sidney B. Bowman Auto'bile Co. Photo Lenses and Shutters of every kind for all purposes ; Amateur Process. THE WINTON MOTOR CARRI4GE CO. Cleveland U.S.A. Orient Buckboard

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.

334 Canadian Patent Laws. The Golden Humbug. Phosphorescence. Inflammable Iron. Wonderful Lighthouse Improvement., scientific american, 1859-06-11

LAUNCHING OF THE IOWA. THE LAUNCH OF THE SEAGOING BATTLESHIP IOWA. THE SEAGOING BATTLESHIP IOWA., scientific american, 1896-04-11

th ELECTRICAL ENGINEERING TAUGHT BY MAIL. PSYCHRATISM THE VERNON ACADEMY VERNON ACADEMY OF MENIAL SCIENCES 2203 East Avenue Rochester N. Y. ence will award a limited number of Free Scholar on request. American School otCorrespondence Boston Mass Wis

Population and Temperature. PANEL DECORATI Antiquarian Research in Mexico. A Census of the Rocks. NS FOR EATON HALL., scientific american, 1881-07-16

Improved Glue Pot for Cabinet Makers and Joiners. of Looms. Petition for the Extension of Patents. Premium for a Printing Press. and Bleaching of Flax. WARREN'S RAILROAD CAR SEATS—Figure 1. IMPROVED AUGER HANDLE. I. .21 eeo, scientific american,

226 Improved Grain Separator and Cleaner. FARMERS' CLUB. CLEES'S GRAIN SEPARATOR AND CLEANER., scientific american, 1865-10-07

A WEEKLY JOURNAL OF PRACTICAL INFORMATION ART SCIENCE MECHANICS CHEMISTRY AND MANUFACTURES. Vol. LXXVNo. 14. Entered at the Post Office of New York N. Y. aa Second Clasa matter.) GOVERNMENT DRY DOCK AT PORT ORCHARD PUGET SOUND WASHINGTON. THE UNITED

AMERICAN AND ENGLISH RAILWAYS. THE FRICTION OF SLIDE VALVES ON THEIR SEATS. AN OPPORTUNITY FOR INVENTORS. Trial of a New Coffer Dam. Tensile Strenpth of Cement. Fire near the Centennial Buildings. The New Bergen Hill Tunnel Completed., scientific

ENGINEERING INVENTIONS. AGRICULTURAL INVENTIONS. MISCELLANEOUS INVENTIONS., scientific american, 1885-02-07

THE SCIENTIFIC AMERICAN. 309, 1860-05-12

scientific american, 1859-11-19

SOME CHINESE VEGETABLES. THE PATENT OFFICE EXHIBIT AT THE PARIS EXPO SITION. OUR EXPORTS OF IRON AND STEEL. DEATH OF PROF. PEPPER., scientific american, 1900-04-07

Lubricator for Cylinders of Steam Engines. Quiet Ebullition of Liquids. The Author's Rage for Titles. Orange Wood., scientific american, 1871-09-02

ENGINES Deliver your goods with Electricity and save time. Time is Money ! POPE MOTOR CAR CO. Kerosene Oil Engine Nothing but Kerosene 0 to run it International Power Vehicle Co. ‘`STANDARD ' Two=Speed Automatic Coaster Brake Hub STANDARD SPOKE AND

The Current Supplement., scientific american, 1905-01-07

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