444 Appendix to Dr. Blag den’s Report 
ioo c to go 0 ; and the difference by the short instrument is 2 di- 
visions. 
The following experiments were made with a mixture of 
equal parts of spirit and water by weight ; the spirit being of 
the strength already mentioned. 
Having charged the instruments with the mixture, and 
brought it to the temperature of 6o°, it was found to stand 
in both of them at 1 above o. The mixture was then cooled 
down to 30°, when it stood at 125 below o in the long instru- 
ment, and 124,5 in the short instrument. It was brought 
back to the temperature of 6o°, when, in the long instrument 
it was found to stand 1,5 above o, but in the short instrument 1 
above o as before. I heated the mixture to ioo°, when it stood 
at 185 in the long instrument, and in the short instrument at 
183,5 above o. The mixture was afterwards cooled to the 
temperature of 6o°, when it was found to stand 2,5 above o in 
the long instrument, but in the short instrument 1,5 below o. 
After keeping them upright in the temperature of 6o° two 
hours, I found the mixture in the long instrument to stand 3 
above o, but in the short instrument 2 below o. I heated 
it again to 100°, when the mixture in the long instrument 
was found to stand 185, and in the short instrument 180,5 
above o. I brought the mixture again to the temperature of 
6o°, and found it stand 2,5 above o in the long instrument, and 
in the short instrument 4 below o. 
From the above experiments the contraction of this mix- 
ture from 6o° to 30° was found to be, by the long instrument, 
125+ 1 = 126 ; but in heating up to 6o° again, the expan- 
sion was 125+ 1,5= 126,5; the mean is 126,25. The ex- 
pansion in heating up from 6o° to ioo° was 185 — 1,5 = 183,5, 
