XI. PATENTS.--Patents.--By JAMES W. SEE 18773

XII. PHOTOGRAPHY.--Amateur Chronophotographic Apparatus.--2

illustrations 18769

XIII. STEAM ENGINEERING.--Combined Steam Pumping and

Motive Power Engine.--1 illustration 18778

XIV. TECHNOLOGY.--The Reclaiming of Old Rubber.--By HAWTHORNE

HILL 18769

XV. WARFARE.--The American "Regular."--By the English

correspondent of the London Times on board the United

States transport "Gussie." 18776

* * * * *

Scientific American Supplement, No. 1178, June 25, 1898 · 第 7 / 43 题