906 PROF. W. H. MILLER ON THE CONSTRUCTION OF THE NEW STANDARD POUND. 
Secondary standards weighed in air. 
The small weights R were made by winding fine silvered brass wire, to whieh a 
weight was attached nearly as heavy as the wire could sustain, round a piece of steel 
pinion-wire. The pinion-wire, with the brass wire wound round it, and still stretched 
by the weight, was then clamped between two pieces of wood, and the rings sepa- 
rated by placing the back of a sharp penknife in one of the grooves of the pinion-wire, 
and pushing it on in the groove till all the coils of the fine wire were cut through. 
The weight of eighty-eight of the rings was found to be 0'99595 grain. Hence 
R=0’011313 grain. The weights 8 of 0'01136 grain each, used in two of the 
observations, were made in the same manner. I ^JiT-j-Q-j-D— -0'00077 grain in 
air (^= 19-63, ^» = 764-43), log t;(I-Q) = 2-51960, log <r-}-D) =2-5 1942. Hence 
I=T-fQ-{-D— 0-00060 gr, T4-D=I— 0-64449 gr. Let W be taken to denote the 
commercial lb. Then, in air, at 65°-66 F., bar. 29-75 inches (^=:18'7, ^ = 755-64), 
at Somerset House, or in air for whieh log A=7-07832— 10, W^^I— -Q-j-O'Ol 102 gr. 
Also, since T-f Q-|-D£!:I-j-0-00077gr., W^T-j-D-f-0-01025 grain. I — Q displaces 
0-39641 grain, and T-f-D displaces 0-39624 grain of air, for which log A=7‘07832— • 10. 
M denotes the mean of the readings of the thermometers D, C. 
G=lb. No. 1. 
D. 
13-15 
13-3 
D. 
13-5 
13-55 
C. 
13-2 
13-35 
F. 
752-4 
100 parts -t- 0-27297 grain. 
E. 
T + D + R + Y, G-l-X 
13*85 T+D-)-2R-|-Y, G-l-X 
S c^l0 
28-10 G-l-X, T-FD-fR-l-Y 
24-96 
26-60 
27- 77 
28- 34 
21-12 G-fX, T-fD-F2R-fY 
19-90 
18- 57 ; 
19- 47 
21-77 
236-60 
20(G-f X)£2:20(T-t-D-t-Y)-l-30R-|-43-57 parts. 
Scale. 
18- 87 
19- 45 
17- 14 
18- 81 
20- 32 
22-47 
19*34 
19-31 
17-77 
19-55 
193-03 
C. F. E. Scale. 
T-|-D + 2R-fX, G-fY 17-52 G-fY, T-fD-h2R-fX 
19-25 
13-5 20-00 
19-67 
20-06 
751-75 14 20-82 
21-55 
13-55 20-50 
22-27 
23-22 
204-86 
20(G + Y) 20(T + D + X) + 40R - 1 3-54 parts. 
40G^40(T + D) + 70R + 30-03 parts, M = 13-39, F=752-07, E = 13-92. 
G£!:T+D + 0-021 83 grain in air (^=13-42, i=750-83). 
G = I-0-00732 grain. 
GiiW + 0-01956 grain in air (log A = 7-07832 — 10). 
Scale. 
18-95 
20-47 
22*09 
23-02 
22-66 
20-39 
22-15 
22- 75 
23- 37 
22-55 
218-40 
