OBSERVATIONS FOR FINDING THE DENSITY OF PC NO. 2. 
835 
Observations for finding the density o/’PC No. 2. 
Weighing of PC No. 2 in air. 
August 13, 1844. 100 parts =0*2432 grain. 
PC. 
T+B+0-653gr. 
20*20 
19-90 
21*30 
20*80 
21*40 
21*50 
22*30 
22*40 
22*80 
24*40 
22*85 
22*45 
22*95 
22*85 
23*80 
23*15 
24*00 
23*10 
24*35 
24*35 
21*47 
19*85 
21*37 
20-65 
21*57 
20-95 
21*52 
20-90 
21*00 
20-55 
20*32 
20-10 
20*22 
19-87 
20*62 
19*72 
20*52 
19-62 
19*95 
19-77 
434*51 
424*88 
PC No. 2-T+B + 0'65417 gr. T=.5759-4881 gr. B = 1239-8880 gr. Therefore 
PC No. 2 7000-0303 grains. 
For PC No. 2, log A= 1-32560. For T+B-{-0-6542, log A=: 1-32564. 
Hence v?C No. 2=330-75, t;(TH-B + 0-6542) =330-72. t;PC No. 2 is greater than 
t;(T+B+0'6542) by the volume of 0-03 grain of water, or of 0-00004 grain of air of 
ordinary density. Hence 
PC No. 2 = 7000-0303 grains. 
July 18, 1844. 
PC No. 2. 
100 parts =0*26 grain. 
PC No. 2 and hook in water. 
H. P. 
16-5 17-3 
In right-hand pan. 
gr- 
0*20 
0*20 
0*20 
0*20 
0*20 
0*20 
0*18 
0*16 
0*16 
0*18 
0*20 
0*24 
0*16 
0*14 
0*20 
0*16 
0*18 
0*20 
16*5 17-3 
0-1867 
5 R 
Scale. 
20*6 
21*2 
21*1 
21*3 
21*5 
23-6 
23*2 
13-0 
15*7 
22-0 
25-4 
38*5 
15*3 
12*5 
23*5 
16-1 
18*9 
21*3 
20*82 
MDCCCLVI. 
