102 
PEICE LIST. 
Apparatus applied to Microscopes Nos. 4, 5 and 6. 
SEE SECTIOS. 
82. Achromatic Condenser, ^27.00 
82. Brass work for ditto, alone, 7.50 
79. Movable Diaphragm Plate, ..... 5.00 
84. Three Dark Wells and Holder, .... 3.00 
110. Polariscope, (Nicol’s prisms,) .... 20.00 
118. Ditto, with Revolving Selenite Carrier, . ... 23.00 
69. Prof. J. L. Smith’s Eye-piece Micrometer and Goni- 
ometer, ........ 15.00 
83. Nachet’s Prism for oblique light, mounted with re- 
volving motion, 12.00 
Apparatus applied to Microscope No. 7. 
82. 
Achromatic Condenser, ..... 
28.00 
82. 
Brass work for ditto, alone, ..... 
8.00 
110. 
Polariscope, (NicoPs prisms,) .... 
20-25.00 
118. 
Ditto, with revolving selenite carrier. 
25-30.00 
84. 
Three dark wells and holder, 
3.50 
69. 
Prof. J. L. Smith’s Eye-piece Micrometer and Goni- 
ometer, ........ 
20.00 
83. 
Nachet’s prism for oblique light, mounted with re- 
volving motion, ...... 
Apparatus for the Inverted Microscope. 
12.00 
69. 
Prof. J. L. Smith’s Eye-piece Micrometer and Goni- 
ometer, ........ 
15.00 
no. 
Polariscope, (with two NicoPs prisms,) specially adapt- 
ed to the inverted microscope, .... 
Brass plate and spirit lamp for heating objects while 
25.00 
under examination, ...... 
Apparatus for Microscopes in General. 
5.00 
63. 
Glass Stage Micrometer, mounted in brass, to 
T Ao of ioch, 
4.00 
64. 
Cobweb-Micrometer Eye- piece, .... 
30.00 
65. 
Ross’ Eye-piece Micrometer, 
8.00 
66. 
Jackson’s Micrometer with Eye-piece, 
10.00 
68. 
Dr. White’s Micrometer, 
2.00 
