SCIENCE— ADVEBTISEMENIS 



A NEW INVENTION 



The Leitz Binocular Microscope 

 Single Objective 



This instrument causes quite a revolution in the micro- 

 scope technique. 



The Binocular Microscope can be used with low and high 

 powers, including Oil-Immersions. 



In viewing with tlie Binocular Microscope, the increase 



in quality of the image is remarlcable. 



One can see the preparation so much clearer, and has the im- 

 pression of observing more details than are usually noticeable 

 with the Monocular type of microscope stand. 



Very seldom are both eyes the same in strength, or in 

 power of accommodation, but in binocular vision when it is 

 possible for them to compensate for one another, both eyes can 

 utilize their optical properties to the fullest extent. One eye 

 may be more inclined as far as sensitiveness for color is con- 

 cerned, and the other with reference to penetrating power ; 

 and in making use of both eyes at the same time, these facul- 

 ties combined increase to a great extent the distinctness 

 and brilliancy of the image. 



It we compare the image of a Monocular Microscope with 

 an image obtained with both eyes, we are mistaken in claim- 

 ing that we see the object more clearly, but we do observe the 

 image with wore life, and the impression of the -presence 0} an 

 increased brilliancy is created. 



After endeavoring to give a brief description of the possi- 

 bilities and effects obtained with the "New Leitz Binocular 

 Microscope ivith Single Objective" we deem it advisable to sum- 

 marize the advantages in the following: 



Binocular vision even with eyes of different refraction. 



Oculars can be adjusted to any inter-pupillary distance. 



One ocular allows for adaptation, so as to overcome any difference of refraction in the 



observer's eyes. 

 Greatest restfulness to the eyes, and accordingly an increase in quality of microscopical 



examiuatious. 

 The vividity (expression for brilliancy and life in images under observation) is carried 



to a remarkable degree, not obtained to any noticeable extent in microscopes of mon- 

 ocular vision. 

 Apparent stereoscopic eSect, suggested to the observer's eyes, due to the brilliancy, life 



and contrast created in binocular vision. 

 Any existing microscope objective, from lowest to highest power, can be utilized, thus 



making unnecessary an investment in a special optical equipment — with the exception 



of oculars only. 

 The descriptive circular lists Duty Free prices on the Microscope stand as well as suitable Achromatic 

 Semi-Apochromatic and Apochromatie Equipments. 



1st. 

 2d. 

 3d. 



4ih. 



6th. 

 7th. 



Write for Literature No. 70. 



UNITED STATES 

 BRANCH 



E.LEITZ 



^Et^I 



30 EAST 18th ST., 

 NEW YORK 



