COMPARISON OF T WITH Sp AND RS. 819 
August 15, 1845. 100 parts =0*27921 grain. 
RS+X, T+Y. 
T+Y, RS+X. 
RS+Y, T+X. 
T+X, RS+Y. 
18*05 
20*30 
15*70 
18*89 
18*64 
21*87 
14*89 
20*05 
18*67 
21*75 
16*06 
19*79 
16*41 
19*47 
16*39 
20 05 
16*96 
20*75 
D= 
16*25 
16*66 
19-85 
16*59 
20*59 
C= 
16*30 
17-00 
19-72 
16*46 
20-04 
F= 
756*9 
18*81 
21*60 
17-17 
20*10 
E= 
16 
16*48 
21*62 
17-79 
21*00 
17*60 
20*47 
17-75 
19*79 
17-94 
20*85 
18*21 
20*53 
15*22 
17-54 
192*70 
226*19 
182*75 
220*43 
22(T + Y)£!:22(RS + X)- 33*49 parts. 22(T + X)ii:22(RS + Y)- 37*68 parts. 
44T£i44RS-0*19871 grain in air (<=l6*29, 6=755*39). 
1845. 
t. 
h. 
gr- 
January 
15. 
9-91 
754*30 
10T=2: lOSp +0*01695 
February 21. 
6*94 
758*80 
40T^ 40Sp +0*02900 
February 26. 
6*28 
752*41 
l6T4i l6Sp +0*00235 
Julv 
26. 
17*53 
759*79 
24T:^^= 24Sp +0*01392 
August 
16. 
15*91 
758*70 
56T— 56Sp +0*04162 
August 
18. 
15*93 
754*99 
40T:^i 40Sp +0*01443 
August 
19. 
15*6 
739*29 
20T£!: 20Sp +0-00169 
August 
27. 
14*95 
764*69 
40T:£t 40Sp +0*04730 
August 
29. 
14*58 
Ti^-hZ 
40T£i: 40Sp +0*04056 
286T:^=286Sp +0*20782 
In 
air (<=13*74, h- 
= 758*91) 
Sp +0*00073 
January 
16. 
t. 
9*05 
h. 
763*46 
gr. 
10T£!: lORS — 0*04539 
July 
28. 
17*01 
753*95 
24T£!: 24eS — 0*10632 
August 
14. 
15*96 
759-34 
44T£i: 44RS — 0*21227 
August 
15. 
16*29 
1hh-Z^ 
44T£i 44RS — 0*19871 
122Tiil22RS- 0*56269 
In 1 
air (<=15*72, h— 
757-19) 
T:Oz RS-0*0046l 
Since ASp was computed by means of Schumacher’s Tables, we must employ the 
value of AT obtained by means of the same Tables in reducing the comparisons of 
T with Sp and RS. By these Tables log A=T32566 for T, and log A=1 ‘32608 for 
Sp and RS. 
T£hSp+0-00073 grain in air (^=1374, 6=758-91). 
T displaces 0-33356 grain of air, Sp displaces 0-33324 grain of air. Therefore 
T=Sp+0-00105 grain. 
T: 2 iRS— 0 00461 grain in air (^=15-72, 6 = 757'19). 
T displaces 0-33037 grain of air, RS displaces 0-33005 grain of air. Therefore 
T=RS — 0-00429 grain. 
If we suppose U to have had the same density as V, Sp=U— 0-52956 grain, 
and RS=U— 0-52441 grain. The former gives T=U— 0-52851 grain, the latter 
T=U— 0-52870. Mean, giving to the former twice the weight of the latter, because 
5 p 
MDCCCLVI. 
