OBSERVATIONS FOR FINDING THE DENSITY OF PC No. 1. 
833 
Hook in water. In right-hand pan. 
gr. Scale. 
T + F + K-|-(l6)-f-(8) + (4) + ('2) + 0-72 28-5 
0”68 7-5 
0-70 15-0 
0-71 21-6 
Air. 0-70 18-0 
<=20-0, &=765-83. 0-72 26-3 
0*68 13*5 
0'72 23-0 
' 0-72 33-0 
0-68 9-0 
0-703 19-54 
PC No. 1 in water (#=19-54)£2:T + F+K + (l6) + (8) + (4) + (2) + 0-6811 gr. in air (^=20-0, 6=765-83). 
July 25, 1844. 100 parts =0-26 grain. 
PC No. 1 and hook in water. In right-hand pan. 
H. 
P. 
gr- 
Scale. 
21-03 
22-15 
0-20 
36-5 
21-0 
22-10 
0-16 
24-8 
0-12 
11-0 
0-16 
22-5 
0-14 
18-5 
21-0 
22-15 
0-16 
24-4 
21-0 
22-1 
0-12 
9-0 
0-14 
18-0 
21-0 
22-1 
0-12 
13-0 
0-16 
22-5 
21-0 
22-1 
0-15 
20-4 
21-0 
22-05 
0-15 
19-5 
20-95 
22-0 
0-15 
19-7 
20-9 
22-0 
0-15 
20-1 
20-99 
22-08 
0-1486 
19-99 
Hook in water. 
In right-hand pan. 
gr. Scale. 
T+F+K + (16)-F(8) + (4) + (2) + 0-98 28-3 
0-94 15-7 
0-96 18-0 
0-98 25-6 
0-94 15-5 
0-96 20-4 
0-98 23-4 
0-94 13-2 
0-98 25-5 
0-94 13-4 
0-96 19-5 
0-98 28-5 
0-94 13-1 
0-96 18-8 
0-960 99-99 
PC No. 1 in water (^=21-15):!lT-t- F + K-l-(l6) + (8)-f (4) + (2) + 0-8114 gr. in air (#=21-6, 6=761-37). 
