Scientific American Supplement, No. 623, page 1 by Various Authors
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ect of the field of work so far traveled over by synthetical chemists, and future prospects. 9956
The Chemical Basis of Plant Forms--By HELEN C. DE S. ABBOTT --Continuation of this important contribution to plant chemistry, one of the most valuable of recent chemical monographs. 9955
IV. ELECTRICITY.--An Electrical Governor--A new apparatus for preserving a constant electromotive force with varying dynamo speed--1 illustration. 9952
Electric Launch--A French government launch with Krebs electric motor. 9954
The electric current as a means of increasing the tractive adhesion of railway motors and other rolling contacts.--By ELIAS E. RIES--A full review of this important subject, with accounts of its experimental examination. 9953
V. ENGINEERING--Benier's Hot Air Engine--A new caloric engine very fully illustrated and described--8 illustrations. 9943
Heating Marine Boilers with Liquid Fuel--A simple apparatus and recent experiments with the same.--3 illustrations. 9945
The Change of Gauge of Southern Railroads in 1886--By C.H. HUDSON.--The conclusion of the account of this great engineering feat, with tables of statistics and data--16 illustrations. 9946
Your Future Problems--By CHAS. E. EMERY--An address to the graduating class of the Stevens Institute, N.J.--A practical view of the engineering profession. 9943
VI. MISCELLANEOUS--A Group of Hampshire Downs--A typical breed of sheep, their qualities and habits.--1 illustration. 9957
VII. NAVAL ENGINEERING--The Spanish Cruiser Reina Regente--A further description of this celebrated vessel--4 illustrations. 9948
Torpedo Boats for Spain--The Azor and Halcon, two Yarrow torpedo boats, described and illustrated--7 illustrations. 9947
VIII. PHOTOGRAPHY--How Different Tones in Gelatino-chloride Prints may be Varied by Developers.--Twenty different formulæ for the above purpose. 9949
Film Negatives--Eastman stripping films, their manipulation and development. 9949
IX. SA