Chapter II: TECHNOLOGY.--Iron and Steel.--By BARNARD SAMUELSON

The world's production of pig iron.--Wonderful uses and demands
for iron and steel.--Progress of Bessemer steel.--Latest
improvements in iron making.--Honors and rewards to inventors.
--Growth of the Siemens-Martin process.--The future of iron and
steel.--Relations between employers and workmen.

Machine for Grinding Lithographic Inks and Colors.--1 figure.

A new Evaporating apparatus.--2 figures.

Photo Plates.--Wet and Dry.

Gelatino Bromide Emulsion with Bromide of Zinc.

The Removal of Ammonia from Crude Gas.