No. 327. THE opt 
asl ea | hes 
The Dissecting Microscope represented in above cut is very 
efficient and convenient for examination of Minerals, Insects, 
Flowers, etc. 
It consists of a glass plate, into which a steel stem is screwed, and 
the magnifiers arranged to slide on the stem. The magnifiers are 
furnished with one, two, or three lenses, which give a magnifying 
power of from 5—30 diameters. Those with two or three lenses are 
provided with a diaphragm, which secures distinctness of definition. 
The stem can easily be unscrewed, and the whole packed in a 
small box. Extra stems of suitable length for lenses of short foci 
accompany the 2 and 3 lens magnifiers. Nickle-plated pliers are 
furnished with instruments, 
The cut is two-thirds of actual size. 
PRICES. 
No. 325, with one lens, = = ™ - $1 00 
s° 326, with two lenses, = = -—_ I 25 
<< 327, with three lemses, = m ~ = 3 50 
< S285 1 ws ss short, plain finish, 
glass parts, without case, = s 1 00 
