Why peach pits?
Click the image to see one of the newspapers (an original source) this notice ran in. Further searches on Chronicling America via the Library of Congress website will turn up more!
A page from the National School Service newsletter. It includes the message from President Wilson referenced in the book. Click on the image for a PDF version.
Linked above is a video on YouTube from the National Archives that shows the production of gas masks during World War I.
(Activity by Amy Cowen)
(A hands-on activity by Teach Engineering)
(A link to the Girl Scout organization)
What is chemical warfare?
Linked above is a video on YouTube from Simple History titled First World War tech: Chlorine Gas & Gas Masks.
Photo curtsey The Girl Scout Museum at Cedar Hill. Click on the link to visit their website.