OBSERVATIONS FOR FINDING THE DENSITY OF PC No. 4. 
857 
In right-hand pan. 
gr. Scale. 
T-hF + K + L + R-l-(l6)-(-(4)+Ml 2M 
Ml 19-6 
Ml 17-8 
M2 23-4 
Ml 181 
Ml 17"6 
Ml 17*0 
M114 19-23 
Counterpoise balances T-l-F-fK-l-L-fR-|-(l6)-|-(4)-|- 1*1130 grain. 
PC& h.in w.(B=9-78)£iT + F-HK + L-l-R-|-(l6)-|-(4)-|-0-0786 gr.in air (C= 10-17, F=755-68, E= 10-37). 
May 22. 
PC and hook in water. 
In right-hand pan. 
B. 
C. F. , E. 
gr- 
Scale. 
9-4 
9*7 756-5 10-5 
1-03 
16-3 
1-04 
22-5 
1-03 
17-0 
1-04 
21-9 
9-45 
1-03 
18-0 
1-04 
22-5 
1*03 
18-4 
1-04 
22*8 
1-03 
18-5 
9-45 
1-04 
22-7 
9-3 
9-8 756-8 10-9 
1-03 
20-4 
1-03 
21-1 
1-02 
18-05 
1-03 
21-05 
1-02 
17-35 
9-55 
1-03 
21-0 
1*02 
19-6 
1-03 
22-8 
1-02 
18-7 
9-6 
1-03 
21-55 
9-5 
9-75 756-65 10-7 
1-0305 
20-12 
Counterpoise in air 
(C = 9’75, F=756*65, E= 10*7) balances PC and hook in water (B= 
9-5) + l-03( 
In right-hand pan. 
gr- 
Scale. 
T + F -f- K -p L -t- R -p (16) + (4) + 1-1 2 
24-93 
Ml 
14-9 
1-12 
24-9 
MO 
14-6 
1-12 
24-1 
Ml 
14-4 
1-10 
19-64 
Counterpoise balances T-pF-fK + L-i-R-f (l6)-|-(4)-f- 1*1 108 grain. 
PC and h.inw. (B=9-5):0:T-pF-t-K-pL + R-f(l6) + (4)+ 0-0806 gr.in air (C=9’75, F=756-65, E= 10-7). 
Apparent weight of PC No. 4 in water, weighed 
with platinum weights. 
Water. 
Apparent weight of PC No. 4. 
Air. 
t . 
gr. 
t . 
h . 
8-71 
6669-524 
7-65 
758-82 
6-92 
6669-503 
7-68 
757-36 
7-88 
6669-516 
8-43 
770-27 
11-01 
6669*568 
10-85 
760-61 
10*11 
6669*566 
11-26 
762-06 
9-76 
6669-337 
10-17 
754-85 
9-49 
6669-3.39 
9-75 
755-79 
