780 PROF.W. H. MILLER ON THE CONSTRUCTION OF THE NEW STANDARD POUND. 
Means of Comparisons of G and L with K in February 1855. 
No. of comparisons. 
G. 
K. 
No. of comparisons. 
L. 
K. 
10 
48-541 
2-365 
10 
51-465 
15-753 
10 
90-797 
11-432 
10 
54-545 
16-089 
10 
111-350 
15-753 
10 
73-010 
18-389 
10 
124-050 
18-389 
10 
92-384 
20-828 
10 
94-698 
21-055 
10 
94-869 
21-079 
10 
97-790 
21-448 
10 
101-515 
21-911 
By a mean of 30 comparisons of G and L between 17° and 20° in July 1846, their 
corresponding readings were 
G. L. 
120-897 67-591 
Means of Comparisons of G, K, L in March and May 1855. 
No. of comparisons. G. K. L. 
11 117-79 17-08 62-38 
10 124-24 18-43 73-36 
6-45 1-35 10^ 
1 part of G=0°-2093, 1 part of L=0°-12295, 1 part of G = l-702 parts of L. 
G. K. L. 
Mean of all 120-860 17-723 67-609 
In July 1846 the corresponding readings of G, L were 120-897 and 67'59]. 
By the observations of 1855, K=17'731 when G= 120-897, and K= 17*721 vvhen 
L=67-591. 
Hence L stood 0°-01 higher, compared with G, in 1855 than it did in July 1846. 
Between March 1845 and May 1855 the zero of G appears to have ascended 0°-01. 
It is probable that the whole or, at any rate, the greater part of this ascent occurred 
before July 1846. On this supposition, in July 1846, the depression of the zero of 
G below its permanent place would be 0°*00, and that of L would be 0°'01. 
The thermometers H, P were used only in the earlier observations. The divisions 
of H were on the tube. The scale of P was traced on paper and enclosed between 
the tube of the thermometer and an exterior tube of glass joined by fusion to the 
thermometer tube at the lower end, and sealed at the upper end. The freezing-point 
of H was -l-0°-50. The freezing-point of P was -]-0°-25. 
By a mean of 13 comparisons of H, P, C, D, their corresponding readings were 
H. p. c. D. 
3-31 3-13 2-93 2-99 
Let 2M=C-1-D. Then the corresponding readings of H, P, M, t will be 
n. p. M. t. if-H. f-p. 
3-31 3-13 2-96 2-91 —0-40 -0-22 
