I. CHEMISTRY, METALLURGY, ETC.--New Analogy between
Solids, Liquids, and Gases.
Hydrogen Amalgam.
Treatment of Ores by Electrolysis.--By M. KILIANI.
II. ENGINEERING, AND MECHANICS.--Electric Railway at Vienna.--With
engraving.
Instruction in Mechanical Engineering.--Technical and trade
education.--A course of study sketched out.--By Prof. R.H.
THURSTON.
Improved Double Boiler.--3 figures.
The Gardner Machine Gun.--With three engravings showing the
single barrel, two barrel, and five barrel guns.
Climbing Tricycles.
Submarine Explorations.--Voyage of the Talisman.--The Thibaudier
sounding apparatus.--With map, diagrams, and engravings.
Jamieson's Cable Grapnel.--With engraving.
A Threaded Set Collar.