SCIENCE 



New Series 



Vol. XL. No. 1039 



Friday, November 27, 1914 



Single Copies, 15 Cts. 

 Annual Sdbsoeiption, |5.00 



BAUSCH & LOME 



UNIVERSAL BALOPTICON 



Arranged, in its simplest form, for the projection of opaque objects and lantern 

 slides. An ideal lantern for Science Departments, since attachments can be 

 added for the projection of microscopic objects, living animalculae, the spect- 

 rum and complementary colors and for demonstrating various physical and 

 chemical phenomena, such as lines of magnetic force, crystallization, etc. Some 

 of its features of construction : 



Simple and easy to manipulate. 



Direct lighting of opaque object, cover- 

 ing areas 6 in. square. 



Correct position, from left to right, of all 

 images on screen ; only one mirror used. 



4. Objects carried on automatically adjust- 

 able horizontal holder. 



5. Quiclc interchange between all forms of 

 projection. 



Price, $160.00 and up, depending on equipment 



No other such instrument can be obtained at the price 



BAUSCH & LOMB OPTICAL CO. 



552 St. Paul St. 



ROCHESTER, N. Y. 



NEW YORK: 200 Fifth Ave. 



WASHINGTON: 613 Fifteenth St., N. W. 

 CHICAGO: 122 S. Michigan Blvd. 

 SAN FRANCISCO: IS4 Sutter St. 



FRANKFURT A.M.: G.m.b.H. 31 Schilleretrasse 

 LONDON: 37 and 38 Hatton Garden, E.C. 



