A Big Christmas Present 

 For Only $1.50 



This year give your friends a real present, 

 one they will enjoy through the whole year. 

 Give the Popular Scie'fice Monthly for 191 7. 

 •i^ year's subscription — twelve issues — costs 

 only $1.50. The twelve numbers will contain 



^'^'■ 



over 4,000 pictures 

 over 2,000 articles 

 over 1,800 pages 



and will tell the whole wonderful story of the 

 year's progress in invention, mechanics, and 

 science. ^ 



A Christmas Gift Card will be sent to each friend 

 announcing your gift. The first copy of the maga- 

 zine and the Gift Card will be received just before 

 Christmas. 



Subscription $1.50. Canadian ix>stage 50c extra. Foreign $1.00 extra. 



Popular Science Monthly Gift Club 



239 Fourth Ave., New York, N. Y. 



