For Every Need of the 

 Microscopist 



Whether you are interested in microscopy as a teacher, as 

 a student, or as a research laboratory worker, you should 

 be familiar with the 



|{auscli"'[omb 



^Microscopes 



In both optics and mechanics they embody the most ad- 

 vanced thought of scientific experts-=^backed by our 60 

 years' experience as the leading American makers of optical 

 goods. Whatever your needs, you will find a Bausch & 

 Lomb Microscope that exactly meets them. 

 Model BH-2 (illustrated) is priced at $3 1 .50. Other models from 

 $2.50 to $40.75 for simple microscopes— and $18.00 to $328.50 

 for compound. 



Our illustrated catalog gives full descriptions 

 and prices. Sent on request 



Special Terms to Educational Institutions 



gausch ^ Ipmb Optical (p. 



412 ST. PAUL STREET ROCHESTER, N.Y. 



New York Chicago Washington San Francisco 



Manufacturers of the famous Tessar and Protar Photographic 

 Lenses, Projection Lanterns {Balopticons) , and other high-grade 

 optical goods. 



"O-FOUR-EIGHT" 



In 55 years the original Esterbrook 

 Falcon No. 048 has grown to be 



the most used of all pens. During that 

 time so many others have been exploited 

 under the name 'Falcon" that to get the 

 real Falcon value it is now necessary for 

 users to remember the original number 

 048 (o-four-eight). 



Any dealer anywhere will know just 

 what you want, if instead of just * Falcon" 

 you say "Elsterbrook No. 048 Falcon." 

 Send 10c for useful metal box contain- 

 ing the twelve most popular Esterbrook 

 styles, including this No. 048 Feilcon. 

 ESTERBROOK PEN MFG. CO. 

 24 to 70 Cooper Street 

 Camden, N.J. 



EsterbrooK 



WmtcG^i N&. Q48 



FINE INKS ^ ADHESIVES 



For those yvho KNOW 



Higgins' 



Drawing Inks 

 Eternal Writing Ink 

 Engrossing ink 

 Taurine Mucilage 

 Ptioto Mounter Paste 

 Drawing Board Paste 

 Liquid Paste 

 Office Paste 

 Vegetable Qlue, Etc. 



Are the Finest and Best Inks and Adheslves 



Emancipate yourself from the use of corrosive and 

 ill-smelling inks and adhesives and adopt the 

 Higgins Inks and Adhesives. They will be a 

 revelation to you, they are so sweet, clean, well 

 put up., and withal so efficient. 



At Dealers Qenerally 



CHAS. M. HIGQINS & CO., Mfrs. 



Branches: Chicago. London 

 271 Ninth street Brooklyn, N.Y. 



