802 
DR, T. R. ROBINSON ON THE DETERMINATION OF 
B=4 oz. ; /'+B / =486 , 2 ; June 8, Bar. 29'745 ; Therm. 59 - 5. 
No. 
D. 
S. 
N. 
A. 
b. 
V. 
V. 
W. 
f". 
Log. p. 
m. 
152 
29 
240 
175-9 
132 
81-6 
28-50 
4-71 
1-59 
86-9 
9 99156 
5-709 
153 
36 
203 
187-3 
60-2 
32-88 
6-69 
2-16 
' 128-4 
11 
4-595 
154 
41 
11 
223 
214 
58 
3613 
7-64 
2-24 
167-8 
,, 
4-436 
155 
48 
11 
245-9 
253 
55-8 
39-835 
903 
2-33 
224-9 
n 
4-042 
B 
— 5 oz. 
;/+B'=582-5. 
No. 
1). 
S. 
N. 
A. 
b. 
V. 
V. 
W. 
/'"■ 
Log. p. 
m. 
156 
36 
240 
202-4 
163-4 
6L-4 
32-79 
5-85 
2 12 
127-3 
999156 
5-246 
157 
41 
__ 
221 
199-8 
63-6 
35-80 
7-14 
2-045 
1637 
11 
4-732 
158 
48 
180 
182 
181-5 
58-2 
39-32 
8-64 . 
2 235 
2150 
" 
4-292 
No. III. was originally constructed with arms of steel plate ^th of an inch thick, as 
I thought that with a length of 1 2 inches there would not be much danger of flexure. 
Sixteen observations were made with it in this state ; but during the seventeenth, 
with D = 75, the screw which attached one of the arms to the centre piece snapped 
off, though 0‘32 inch thick. The arms were now made of steel tube similar to No. I. 
On June 8 an observation, 164 , was made with D = 35 , which gave exactly'the V of 
163 ; and a v only 0'071 less. At the time I thought this difference was merely 
casual, and did not repeat these sixteen observations ; but it is more probable that 
the difference is real, in part at least, and must be kept in mind when discussing the 
observations. These are given in Table XII., No. III. 
Table XII. 
No. Ill /= 201-3 ; May 30, Bar. 29‘94 ; Therm. 670. 
No. 
D. 
S. 
N. 
A. 
b. 
V, 
V. 
W. 
f". 
Log. p. 
m. 
159 
14-5 
240 
35| 
60 
283-2 
5-79 
1-07 
0-48 
59 
9 99927 
4-964 
160 
18 
64-9 
179-5 
111-4 
10-515 
3-20 
1-23 
20-4 
2-896 
161 
22 
83 
246 
85-4 
13 45 
4-39 
1-59 
34-6 
2-699 
162 
28 
11 
101 
312 
69 7 
16-36 
5 57 
1-95 
54-5 
2-589 
163 
35 
11 
120 
392 
66-2 
19-44 
7-00 
2-05 
8L6 
11 
2-4S55 
164 
35 
120 
388 
66-4 
19-44 
6-93 
1 89 
81-9 
2-534 
165 
45 
1457 
482-8 
56 
23-61 
8 62 
2-42 
1307 
2-461 
166 
56 
180 
124 
424 
56 
26-79 
10-09 
2-42 
184 
2-415 
167 
75 
210 
195-2 
676 
61 
31-63 
12-07 
2-23 
290 8 
1) 
2-4365 
B=3 oz. ; /+B / =770-8. 
No. 
D. 
S. 
N. 
A. 
b. 
y. 
V. 
W. 
Log. p. 
m. 
168 
17-5 
240 
65-3 
44 
103-4 
10-58 
0-77 
1-34 
20-7 
9-99927 
11-963 
169 
22 
84 
154-9 
93 
13-61 
2-765 
1-46 
357 
,, 
4-394 
170 
28 
102 
249-6 
81-2 
16-53 
4 445 
1-67 
56 
3-324 
171 
37 
123-5 
351-5 
76 
20 01 
6-27 
1-79 
88 
2-905 
172 
47 
150-8 
472-4 
77-2 
24-43 
8-43 
1-76 
1434 
2-689 
173 
57 
165‘6 
535 
59-6 
26-83 
9-55 
2-28 
184-9 
2-571 
174 
66 
182-6 
608 3 
66"2 
29-59 
10-86 
2-05 
2*6 
11 
2519 
