|First issue||November 1915|
There were six Volumes. The first volumes were published monthly until Volume 4 Number 12 (October 1919).
Volume 5 did not start back up until January 1920 and again was published regularly until Volume 6 Number 5 (May 1921). Volume 6, Number 6 did not appear until January 1922. The next 5 issues were published monthly until June 1922 (it's 70th issue) as Volume 6, Number 11.
Thirteen years later, in 1935, one last issue was created by Collins Pentz, Vol. 6 No. 12, to finish the set.