Prof. SAMUEL BELL. M.D.--An excellent presentation of modern
practice in the light of bacteriology

Test Card Hints.--How to test the eyes for selecting eyeglasses
and spectacles

The Composition of Koch's Lymph.--What Prof. Koch says it is and
what it can do.--The cabled account of the disclosure so long
waited for

XII. TECHNOLOGY.--Firing Points of Various Explosives.--The
leading explosives, with the temperature of their exploding
points tabulated

The Recovery of Gold and Silver from Plating and Gilding
Solutions--A paper of interest to silver and gold platers, as
well as photographers

Water Softening and Purifying Apparatus.--An apparatus for
treatment of sewage, etc., chemically and by deposition.--1
illustration

* * * * *




THE FRENCH IRONCLAD WAR SHIP COLBERT.