American goods, excellence of 89 Astronomical notes* 90 Astronomical observation* 91 Brass, recipe for cleaning [4] 91 Cancer, treatment of 85 Chloride of lime, to neutralize [6] 91 Coal, distillation of* 85 Discoveries, Prof. Marsh's recent 90 Drawings, how to mount [19] 91 Drawings, printing copies of [9] 91 Edison telephone and Hughes' microphone 80 Education, industrial 90 Eel, natural history of the 79 Electro-magnet, to construct [12] 91 England, wages in 85 Engraving, photographic 82 Exhibition, American Institute 84 Export edition, Scientific Amer. 80 Fire, chemicals to extinguish [22] 91 Flour, explosiveness of 87 Gas, saw tempering by natural 87 Germany, labor in 89 Gold, how to melt [18] 91 Hair, removing superfluous [1] 91 Hughes, letter from Prof. 80 Industrial enterprises, new 84 Ink to rule faint lines [7] 91 Inventions, new 86 Inventions, new agricultural 86 Inventions, new engineering 87 Inventions, new mechanical 89 Iron making, progress of 80 Journalism, crooked 88 Lathes, attachment for* 86 Lemon verbena, new use for 89 Life, minute forms of 85 Lime light, how to make [14] 91 Main joints, street 88 Mormons, hint from the 86 N. Y. Capitol, machinery for 87 Paris Ex., Japanese Building* 87 Paris Exhibition, the park* 79 Patent law, our 84 Pens, fountain 80 Petroleum June review 90 Petroleum oils as lubricators 89 Petroleum, short history of 85 Plants, etc., influence of light on 89 Poisoning of a lake, remarkable 90 Production, ill-balanced 89 Production, more perfect 88 Puddling, mechanical* 82 Quick work 86 Rainfall, decrease of N. Y. 86 Rhinoceros Hornbill, the* 87 Shad hatching, successful 88 Shellac, to dissolve bleached [2] 91 Shoes, dressing for ladies' [21] 91 Silk worm breeding 79 Substances, how to rate [3] 91 Sun, the* 80, 81 Teeth, replanting, etc. 84