OBSERVATIONS FOR FINDING THE DENSITY OF PC No. 1. 
83 i 
March 20, 1845. 100 parts =0"29485 grain. 
(2), (1)+G. (1)+G, (2). 
(1),G. 
G, (1). 
2*98 
3*46 
2*80 
3*65 
3*10 
3*57 
2*75 
3*72 
3*12 
3*67 
3*02 
3*72 
9*20 
10*70 
8*57 
11*09 
(1) + G= 
:(2) + 0'00074 grain. 
G=(l) + 0*00124 
grain. 
Hence 2(1)=(2)— 0*00050 grain. 
Hence 
gr. 
2J 
= (2) 
+ 0*00030 
2J + (2) 
= (4) 
— 0*00021 
2J + (2) + (4) 
= (8) 
- 0*00032 
2J + (2) + (4) + (8) 
= (I6) 
— 0*00051 
2J + (2) + (4) + (8) + (16) 
= (32) 
+ 0*00009 
2j + (2) + (4) + (8) + (l6) + (32) 
=(64) 
— 0*00038 
2J 
= (2) 
+ 0*00030 
4J 
= (4) 
+ 0*00009 
8J 
-(8) 
+ 0*00007 
16J 
= (16) 
— 0*00005 
32J 
= (32) 
+ 0*00050 
64J 
= (64) 
+ 0*00053 
80J 
= (64) + (l6) + 0*00048=79*99647 
40J 
= (32) + (8) + 0*00057 
= 39*99822 
Mean. 80J— 79*99646 
649=63*99717 
(64) 
= 63*99664 
329=31*99858 
(32) 
= 31*99808 
169=15*99929 
(16) 
= 15*99934 
89= 7*99965 
(8) 
= 7*99938 
49= 3*99982 
(4) 
= 3*99973 
29= 1*99991 
(2) 
= 1*99961 
9= 0*99996 
(1) 
= 0*99936 
Ohservatlons for finding the density of VC No. 1. 
Weighing of PC No. 1 in air. 
August 12, 1844. 100 parts =0*2564 grain. 
PC. 
T-j-B-t-0'67 grain. 
19*00 
20*80 
21*65 
21*00 
21*30 
21*50 
20*70 
20*50 
20*50 
20*80 
21 *.35 
20*93 
21*95 
20*40 
20*35 
18*90 
19*80 
19*00 
19*30 
18*60 
18*93 
17*60 
18*20 
17*70 
18*10 
17*60 
18*00 
16*85 
17*30 
16*95 
17*60 
16*90 
17*43 
16-50 
17*40 
16*85 
17*13 
17*00 
18*10 
17*30 
384*55 
373*70 
