244 
ELEMENTARY CHEMICAL MICROSCOPY 
Table I. 
LIQUIDS FOR THE DETERMINATION OF THE REFRACTIVE 
INDICES OF SOLIDS BY IMMERSION METHOD. 
Index of 
refraction.' 
Name. 
Approximate 
boiling point. 
°C. 
Approximate density. 
1.32 
Methyl alcohol. 
66 
0.79 
1.36 
Ethyl ether. 
35 
0.71 
. 1-37 
Ethyl alcohol. 
78 
0.79 w=i.362 
1-39 
Heptane. 
98 
0-73 
1.40 
Amyl alcohol. 
132 
0.83 
1.44 
Chloroform. 
61 
1.48 
1.46 
Carbon tetrachloride. 
76 
1-59 
1.46 
Cajeput oil. 
174 
0.92 
1-47 
Glycerine. 
290 
1.61 
1-47 
Turpentine. 
155 
0.86 
I -47 
Olive oil... 
1.48 
Castor oil. 
1.49 
Xylene. 
136 
0.86 
1.49 
Benzene. 
80 
0.88 n = i .$ o ^ 
I . 50 
Clove oil. 
1.51 
Cedar wood oil. 
1-52 
Monochlorbenzene. 
132 
1.04 w = i.S4® 
I -55 
Nitrobenzene. 
209 
1 . 20 
1 . 56 
Monobrombenzene. 
I 
1-57 
Orthotoluidine. 
197 
1.00 
1.58 
Monobromphenol. 
195 
1.58 
Bromoform. 
149 
2.83 01 = 1.593 
1 . 61 
Quinaldin. 
240 
I 05 
1.62 
Monoiodobenzene. 
187 
1.83 
1.62 
Quinoline. 
239 
1.09 
1.625 
Carbon bisulphide. 
46 
1.29 
1.63 
Alpha-monochlornaphthalene 
255 
1.50 M= 1.643 
1.65 
Alpha-monobromnaphthalene. 
277 
1-50 
1.76^ 
Methylene iodide. 
180 
3-34 
■ The values for n in this column are those obtained in the author's laboratory at 20 °- 22 ° 
C. by means of the refractometer on Merck products. 
2 Schroeder van der Kolk, 1. c. 
3 Kley, 1. c. 
