154 Mr. Woodhouse on the derangement of certain 
October 2 6 . Upper culmination. 
4th 
5 * 
m. s. 
58 48 
m. s. 
9 44 
Polaris. 
After the star had passed the middle wire I held, for about 
9 minutes, the upper eastern and lower western brace, one 
in each hand. 
Now, S^ 10 48 s -$- i o'™ 38 5 .2 - - 9 m 26\Z 
Observed passage - 9 44 
Deviation to the west - 17.8 
October 28th. Upper culmination. 
4th 
5 th 
m. s. 
58 47 
m. s. 
9 2 9 
Polaris. 
After the star had passed the middle wire, I held, for about 
9 minutes, the 2 lower braces, one in each hand. 
58“ 47’ + io m 38\2 
Observed 
Deviation to the west 
Computed transit at 
5 th. 
- 9 m 2 5 \2 
29 
3-8 
In this case, as in those of pp. 149, 152, the expansions of the 
braces counteracted, and nearly balanced, each other, since 
the deviation does not much exceed the error of observation. 
I think I may presume to say, that the foregoing experi- 
ments incontrovertibly show that the partial heating of the 
diagonal braces, or the partial heating of any one of the 
braces, deranges my transit instrument; the derangement 
