Chapter II: TECHNOLOGY AND CHEMISTRY.--Apparatus for Obtaining

Pure Water for Photographic Use. 3 figures.

Black Phosphorus.--By P THENARD.

Composition of Steep Water

Schreiber's Apparatus for Revivifying Bone Black. 5 figures.--
Plant: elevation and plan.--Views of elevation.--Continuous
furnace.

Soap and its Manufacture from a Consumer's Point of View.
(Continued from SUPPLEMENT, No. 330).

Cotton seed Oil.--By S. S. BRADFORD.

On some Apparatus that Permit of Entering Flames.--Chevalier
Aldini's wire gauze and asbestos protectors.--Brewster's account
of test experiments.