gy
capable of causing a vast amount of destruction
when released 16

Women in a munition plant engaged in the manufacture
of tri-nitro-toluol 17

A chemical reaction on a large scale 32

Burning air in a Birkeland-Eyde furnace at the DuPont
plant 33

A battery of Birkeland-Eyde furnaces for the fixation of
nitrogen at the DuPont plant 33

Fixing nitrogen by calcium carbide 40

A barrow full of potash salts extracted from six tons of
green kelp by the government chemists 41

Nature's silent method of nitrogen fixation 41

In order to secure a new supply of potash salts the United
States Government set up an experimental plant at
Sutherland, California, for utilization of kelp 52

Overhead suction at the San Diego wharf pumping kelp
from the barge to the digestion tanks 53

The kelp harvester gathering the seaweed from the Pacific
Ocean 53

A battery of Koppers by-product coke-ovens at the plant
of the Bethlehem Steel Company, Sparrows Point,
Maryland 60

In these mixing vats at the Buffalo Works, aniline dyes
are prepared 61

A paper mill in action 120

Cellulose from wood pulp is now made into a large variety
of useful articles of which a few examples are here
pictured 121

Plantation rubber 160

Forest rubber 160

In making garden hose the rubber is formed into a tube
by the machine on the right and coiled on the table
to the left 161

The rival sugars 176

Interior of a sugar mill showing the machinery for crushing
cane to extract the juice 177

Vacuum pans of the American Sugar Refinery Company 177

Cotton seed oil as it is squeezed from the seed
by the presses 200

Cotton seed oil as it comes from the compressors flowing
out of the faucets