APPARENT WEIGHT OF THE COMMERCIAL STANDARD. 
861 
June 30. 
100 parts= 0-29981 grain. 
PS+X, T-l-Q-l-D-l-Y. T-fQ+n+Y, PS+X. 
PS+Y, T-(-Q+D-|-X. T+Q+D+X, PS+Y. 
18-70 
16-22 
16-16 
16-74 
17*95 
16-32 D= 18-8 
16-96 
16-92 
17-75 
16-00 C= 18-85 
16-24 
16-55 
17-24 
15-56 F = 761-20 
17*32 
16-84 
17*61 
15-90 E= 19-9 
16-34 
16-56 
89-25 
80-00 
83-02 
83-61 
10(PS + X)^ 
1 0 (T- 1 - Q + D + Y) - 9-25 parts. 10(PS + Y)£bl0(T+Q + D + X) + 0-59 part. 
20PSbi20(T + Q-|-D) — 0 - 02596 grain in 
air (iJ= 18-87, &=759-23). 
gr. t. h. 
40PS=2:40(T + Q + A) —0-12811 
19*68 
765-49 
20PS:£b20(T + Q + A) —0-04038 
19-70 
746-53 
20PS:£1:20(T + Q+A) -0-06643 
18-83 
756-03 
40PSit40(T+Q+B) -0-05781 
1912 
767*35 
20PS:O:20(r + Q + B) -0-05267 
19*7 
746-53 
20PSib20(T+Q + B) -0-02800 
18-83 
756-03 
20PS:ib20(T +-Q + C) -0-00834 
19-15 
750-60 
40PS:£i:40(T+Q+C) -0-07068 
18-65 
753-85 
20PS:ri20(T4-Q + C) -0-05067 
18-87 
759*23 
40PS=ib40(T+Q + D) -0-01176 
18-32 
764-85 
40PSib40(T+Q+D) -0-03971 
21-31 
766-60 
20PS£b20(T+Q + D) -0-02596 
18-87 
759-23 
Means. 
gr. 
t. 
b. 
PS£bT+Q + A -0-002936 
19*47 
758-38 
PSibT + Q+B -0-001731 
19*19 
759*31 
PS^T + Q + C -0-001621 
18-83 
754-38 
PSbbT+Q+D -0-000774 
19-63 
764-43 
Mean of all. 
gr. 
t. 
b. 
-T + Q + KA + B + C + D) -0-00177 
19*28 
759*: 
Or, since A + B + C + D = 4F + 4G— 0'00712 grain, 
PS^bT + Q+F+G— 0’00355 grain in air (<=19‘28, 5=759'12). 
T+Q + F+G-0-00355 grain =7000-00073 grains. 
PS displaces 0'39744 grain of air, T+Q + F+G — 0‘00355 gr. displaces 0‘39727 gr. 
of air. Hence 
PS=T+Q+FH-G-0-00338 grain. 
Hence, supposing U to have had the same density as V, PS=7000’00093 grains, of 
which U contained 5760. 
Apparent weight of the Commercial Standard. 
During the comparison of U with Sp and RS in Somerset House, the mean tempe- 
rature was 18°°7 G., and the mean height of the barometer, reduced to 0°C., was 
755*64 mm. PS displaced 0*38035 grain of air, T-|-Q+F-|-G displaced 0*38019 grain 
of air, when ^=18*7, 6=755*64. Hence PS^bT+Q-J-F-f-G— 0*00354 grain in air 
(f=18*7, 6=765*64) in Somerset House. 
5 u 2 
