uration in a mortar in the water dissolve the nitrate of silver In the ammonia and add to the carbonate of soda solution. Heat gently to the boiling point; the Ink at first turbid becomes clear and very dark. 2. What lenses do better for a telescope or for a microscope ? A. Your lenses will not answer If your description is correct. A tolerable two inch achromatic object glass costs $4.50 and a useful microscope $6.00. Either would be preferable to a chance combination of cheap lenses. tages. 2. Suppose the wheel of a rotary engine to have % of a square inch effective pressure and its mean dis The paint must be constantly renewed. 2. How can copies of the ficnorrigic Anzinceig ? A. No. 5. How makes any difierence which is the longest or whether either tube. Ten per cent of the solar light and heat will then be reflected up to h „ eyepiece and 90 per cent will pass out of the lens. A diaphragm over the objec tive may be used. Two sun glasses should be used to gether a claretand a green one. The sun's image may, scientific american, 1874-05-11
Keywords:
uration, mortar, water dissolve, nitrate, silver, ammonia, add, carbonate, soda solution, Heat gently, boiling point, Ink, first turbid becomes clear, dark, 2, lenses do better, telescope, microscope ?, Your lenses will, answer, your description, correct, tolerable two inch achromatic object glass costs $4.50, useful microscope $6.00, preferable, chance combination, cheap lenses, tages, 2, Suppose, wheel, rotary engine, %, square inch effective pressure, mean dis, paint must, constantly renewed, 2, copies, ficnorrigic Anzinceig ?, No, 5, makes any difierence, longest, whether, tube, Ten, cent, solar light, heat will, reflected up, h, eyepiece, 90, cent will pass out, lens, diaphragm, objec tive, Two sun glasses should, gether, claretand, green, sun' image, scientific american, 1874-05-11, science, scientific, sciences, mind, health, tech, sustainability, publication, lab, sciam, sa, scientist, research, american, experiment, education, discovery, technology, analysis, magazine, u.s., insights, developments, weekly, broadsheet, inventor, innovation, inventions, patented, industrial revolution, emerging, trends, monthly magazine, united states, engravings, curious works, paper, discover, Scientific Paper, Weekly Journal, Practical Information, Art, Science, Mechanics, Chemistry, Manufactures, research, education, scientist, innovation, 19th century, vintage, america, Rufus M. Porter, 1845, journal, academic, newspaper illustrations, retro style, old-fashioned, media illustrations, victorian style, news, newspaperheadline, 19th century style, illustration, journalism
Image ID:
The watermark in the image will not appear on the final download.