842 PaOF.W. H. MILLER ON THE CONSTRUCTION OF THE NEW STANDARD FOUND. 
Apparent weight of the hook in water. 
March 27 
April 1 ... 
April 5 
April 8 ..., 
April 16 . 
April 17 
gr. 
109-8592 
109-8686 
109-8821 
109-8800 
109-8761 
109-8863_^ 
Means. 
109-875 
April 30 
Maj^ 5 .. 
May 7 .. 
May 10 
May 22 
109-9137^ 
109-9303 I 
109-9085 > 
109-9114 
109-9201 
109-917 
May 30 
May 31 
112-15671 
112-1527/ 
112-155 
March 27 ... April 17* Hook in water 109-875 grains of platinnm in air. 
April 30 ... Majr 22. Hook in water £i:109-9l7 grains of platinum in air. 
May 30 ... 31. Hook in water £5=112-155 grains of platinum in air. 
With 6680 grains in the right-hand pan, — March 27. ..April 8, 100 parts =0‘197 
grain. April 29. ..May 3, 100 parts= 0-32 grain, liable to some uncertainty on 
account of the state of the knife-edge. May 9. ..May 30, 100 parts =0-207 grain. 
The dimensions of the wire by which the lbs. were suspended was such that a por- 
tion of the wire corresponding to 100 parts of the scale displaced 0-01365 grain of 
water. Hence, when a platinum lb. is suspended in water from the right-hand pan, — 
March 27. ..April 8 .... 100 parts =0-21 1 grain. 
April 29. ..May 3 100 parts =0‘33 grain. 
May 9. ..May 30 100 parts =0-221 grain. 
The thermometer B was suspended in the water with its bulb in a horizontal plane 
through the middle of the lb. ; the thermometer C was placed in the balance case. 
F denotes the reading of Ernst’s barometer, E that of its attached thermometer. 
The counterpoise in the left-hand pan is supposed to be in equilibrium with the 
weights in or suspended from the right-hand pan, when the reading of the scale is 20. 
Weighing of PS in air. 
June 4, 1845. 100 parts =0-2649 grain. 
PS-I-X. 
T+C-{-0-68gr.-|-Y. 
PS+Y. 
T+C+0-68gr.+X. 
19-70 
18-60 
15-05 
19-40 
19-50 
18-95 
16-10 
18-00 
18-70 
18-05 
15-10 
17-50 
18-40 
17-10 
D = 
13-3 
15-70 
18-00 
17-00 
18-00 
C= 
13-4 
14-90 
16-90 
16-20 
18-10 
F= 
750-7 
PS+Y. 
T-f~C-|-0’67 gr.-j-X. 
17-20 
18-60 
E= 
14 
16-40 
14-30 
17-80 
17-75 
14-65 
15-80 
18-10 
19-05 
16-25 
13-80 
16-90 
18-70 
14-05 
13-70 
179-50 
183-70 
15-50 
12-75 
153-70 
160-15 
10( PS-f X)£hl0(T-;l-C + 0-68gr.-l-Y) — 4-2 parts. 10(PS-kY)£!: 10(T-i- C-f 0-675 gr. + X)— 6-45 parts. 
20PS = 20(T + C)-|- 13-52179 grains. 
