Scanned , June 2005. Proofed and formatted by John Bruno Hare. This text is in the public domain in the United States because it was published prior to 1923. These files may be used for any non-commercial purpose provided this notice of attribution is left intact in all copies.
Title Page
p. 2
Copyright, 1913
Revised And Enlarged
Copyright, 1920
By
Marshall B. Gardner
\"All Rights Reserved
Verso
p. 3
Dedicated To The Continued Progress Of Science And The Service That It Can Render To Humanity