VWhatdid John Spargo asking Americans to do after they read his book?

He wants people to take action against things that cause illnesses, like milk that is causing babies and mothers to become sick.

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.