TO THE DEAF. 
A rich lady, cured of her deafness and noises in the head by Dr. 
Nicholson's Artificial Ear Drums, gave $10,000 to his oon so that 
deaf people unable to procure the Ear Drums may have them 
Address No. 11479. THE NICHOLSON acetone 
780 Eighth Avenue, New York, U.S.A. 
MARINE BIOLOGICAL SUPPLY DEPARTMENT 
Sede ere of all types of animals, for class 
or the museum. For price list 
e all information, address 
GEO. M. GRAY, CURATOR - - WOODS HOLL, Mass. 
po MICROSCOPES 
of every size, style and price, suited 
for all kinds of work. 
A new series of lenses 
for dissecting work have | 2e 
recently been perfected by — . 
us which have unusually 
long working distance and  . 
à; large flat field. These 
Lens Holder for Anatomical Work. lenses are offered. at 
prices less than any lenses of equal quality heretofore 
in use. The new Dissecting Stands are all nickel 
metal with glass stage. 1@ Catalog free. 
Sample copy JOURNAL OF APPLIED MICROSCOPY on request. . 
BAUSCH & LOMB OPTICAL CO. 
25th Street and Broadway, ROCHESTER, NY. m e T ien 
PUBLICATIONS oF THE TESTA ED x 
| ON the late PROrEssoR E. D. COPE. cow 
With Introduction by HENRY FAIRFIELD osom sen: | EB 
MS o. Cloth, $125; paper, $1.00. - ; 
| Bos GINN & COMPANY, AGENTS 
