Journal of Entomology and Zoology — Advertising Section 



The New Home Balopticon 



Equipped with a nitrogen-filled Mazda lamp which gives a 

 brilliant illumination and a clear definition. Is superior to 

 anything yet offered in this type of apparatus. Write for 

 booklets. $35.00 for Opaque Projection only: $45.00 with 

 Lantern Slide Attachment. 



Bausch & Lomb Optical Co. 



Factory, Rochester, N. Y. | 54 Suttef Street, San Francisco 



Also manufacturers of Bacteriological Apparatus, Centriguges, Microscopes, Laboratory Apparatus, 

 Magnifiers and Photomicrographic Apparatus 



New No. 65 

 Spencer Microscope 



ADVANTAGES 



EXTRA LARGE STAGE, 112 x 108mm. 



ARM 75mm PROM OPTICAL AXIS. 



LOW COMPACT CONSTRUCTION. 



BLACK LACQUERED BODY TUBE. 



GENUINE VULCANITE COVERED STAGE. 



IRIS DIAPHRAGM OPERATED BY A KNURLED 

 RING EASY TO REACH. 



AUTOMATICALLY LUBRICATED FINE AD- 

 JUSTMENT BEARINGS. 



NEW TYPE HANDLE ARM. 



SYMMETRY OF OUTLINE. 



BEAUTY OF FINISH. 



SUPERIOR OPTICS. 



IDEAL FOR LABORATORY WORK 

 Send for Revised Price List for 1914 



Spencer Lens Co. 



BUFFALO, N. Y. 





lUrt ^CkR 16mm and 4mm objectives 

 liU. \fOU Oouble nosepiece 



One eyepiece 



Cabinet €91 Crt 



Discount to schools 'pOt.VV 



CLASS WORK MATERIAL 



CAN BE PROCURED AT ANY TIME OF 

 THE YEAR FROM 



C. S. BRIMLEY, Zoologist 



1 1 35 Newberne Avenue 



RALEIGH, N. C, U. S. A. 



Twenty- one years' experience 



Price List on Application 



