may be Varied by Developers.--Twenty different formulæ for
the above purpose. 9949

Film Negatives--Eastman stripping films, their manipulation
and development. 9949

IX. SANITATION--French Disinfecting Apparatus--A portable
apparatus for disinfecting clothes and similar objects--1
illustration. 9952

X. TECHNOLOGY.--The Manufacture of Cocaine--The extraction
of cocaine with alkali and petroleum, with statement of
percentage yielded by various leaves. 9954

The Production of Oxygen by Brin's Process--The commercial
manufacture of oxygen by means of baryta--3 illustrations. 9950


#Transcriber's Note: Following entry not in original table of contents#

Deep Sea Dredgings: Examination Of Sea Bottoms. By THOMAS 9958
T.P. BRUCE WARREN.

* * * * *




BENIER'S HOT AIR ENGINE.