BGIENGE-ADVERTISEMENTS 



SCIENCE 



A WEEKLY JOURNAL DEVOTED TO THE 

 ADVANCEMENT OF SCIENCE 



Entered in the post-office at Lancaster, Pa., as second class matter 



'Published every Friday by 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



SUB-STATION 84: NEW YORK 



PROVIDENT TEACHERS' AGENCY 



120 Tremont Street BOSTON, MASS. 



Considerate, just, experienced. We serve univer- 

 sities, colleges, technical schools and all others. 

 We nominate only on request of the employer. 

 Director, JAMES LEE LOVE, A.M., formerly of 

 the Faculty of Harvard University. 



MARINE BIOLOGICAL LABORATORY 



WOODS HOLE, MASS. 

 biuiog:JcaJ Material 



1. Zoologry. Preserved znavcriEj of all types of animalt 

 for class work and for the museum. 



2. Embryology. Stages of some invertebrates, fishes (in- 

 cluding Acanthias, Amia and Lepidosteus), Amphibia, and 

 some mammals. 



3. Botany. Preserved material of Algae, Fungi, Liver- 

 TVorts, and Mosses. Price lists furnished on application to 



GEORQE M. GRAY, Curator, Woods Hole, Mass. 



~~~ ELEVENTH EDITION 



THE MICROSCORE, 



an introduction to Microscopic Methods and to Histology, by 

 Simon Heney Gage of Cornell University. The 11th edition 

 has eight pages of new matter and corrections, otherwise it is 

 like the 10th ed. Price ?2.00 postpaid. 



COMSTOCK PUBLISHING CO., Ithaca, N. Y. 



OUR 1913 CATALOG 



Contains many new instrumenta, all i 

 new illustrationa, lowest prices and 

 ^ valuable information of interest to every i 

 I science instructor. Send us your name . 

 and address and we w ill send you a free " 

 > copy. 



Sales Sep't V 

 * Chicago Apparatus Co., Chicago. III. ^ 



The E 



flicro Kino 



Motion Picture Camera 



For taking Serial Photographs ol 

 living micro-organisms 



using regular (standard) size film 



Adaptable to any good microphotographio 

 Apparatus 



Ordinary motion pictures can be made with 

 it as Tvell. 



For Research Work 

 as -well as Lecture Purposes 



notion Picture Cameras 

 are Indispensable 



Ciroulrr on apparatus illustrated, and the 

 booklet "Kino Science " on request. 



Imported by 



MAX MEYER 



18 W. 27th St., New York 



Importer of and Dealer in 



Saropean Cameras anrl Scienti&o 

 lastrnmenta 



