Chapter 20 CHEMISTRY IN THE WAR.

Substitutes for Cotton-Nitrates Produced from Air-Yeast a Real Substitute for Beef-Seaweed Made to Give up Potash-A Gangrene Preventative-Soda Made Out of Salt Water-America Chemically Independent.

It is when men are put to the test that they develop initiative and are inspired to great things. In the stress of circumstances there were created t

            
            

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