SCIENCE— ADVERTISEMENTS 



XI 



The new 



"Mamey'' 



Motion Picture 



Projector 



for the classroom 



is practically dangerless, requires no 



special preparations — 



is instantly attachable to any electric 



socket and available for all currents: 



no rheostat necessary 



Supplement your lectures now with 



modern, progressive and 



interesting motion 



pictures. 



Order now— if you want it quickly 



Complete with two spools to take regular (1000 feet) lengths standard size film, lens; incan- 

 descent lamp, cord and plug, and total reflex screen of 56 x 56 in. size. Duty Free - $45.00. 



Literature " S. P." from 



MAX MEYER, iswest 27th street, NEW YORK 



Importer of 

 SCIENTIFIC INSTRUMENTS AND HIGHEST GRADE CAMERAS 



The Jones 



FILING 

 BOXES 



Are Made 

 In Any Size 



Surely, That Clipping is in My Desk 



Certainly, that's where it is, but yon must depend upon 

 your luck to find it because, unfortunately, there are a 

 thousand others in the same place. 



Don't rely on mere chance. File your papers system- 

 atically and you can find any one of them whenever you 

 want it. 



The JONES FILING BOXES will preserve and locate 

 all your papers. One of the variouB styles v?ill be sure to 

 suit you. Mail the coupon below and get a catalog. 



THE JESSE JONES PAPER BOX CO. 



613-615 Commerce Street PHILADELPHIA 



JESSE JONES PAPER BOX CO., 



613-61S Commerce St., Philadelphia 



Gentlemen: — PlcAst send me your booklet 

 givins full information about Jesac Jonei Fil- 

 ing Boxes- 



Name 



Address 



