252 PEOPESSOE B. C. BEODIE ON THE AlOmO WEIGHT OP GEAPHIIE. 
I- f rfT<Ar, thp p-ases evolved being passed over heated oxide of copper. At the 
current of oxyg ^ h g ^ , 
Tn7ll“ thl substa^e and the oxide of copper. The ordinary potash- 
Lbs were replaced by two tubes fiUed with pumice moistened with concentrate so u- 
‘“int^e^^ascertain in the most rigorous manner the point 
of the compound became fixed, it was analysed after each successire oxidati . 
be seen that the analyses became constant upon the ’ 
most prolonged action of <>« Lpamtion of 
mixture :• — 
the first instance 
once, in the second, tw 
I. 
II. 
Carbon . . 
. 69-67 
67-79 
Hydrogen . . 
. 1-48 
1-84 
Oxygen . . 
. 28-85 
30-37 
100-00 
100-00 
The following are the results of analysis after the constitution of the body may be 
rega" fix!d. Analyses 1 and 2 are of a substance prepared by o” ”‘- 
analyses 3 and 4. of a substance prepai-ed by five treatments ; analysis 5, of subs an 
;Sred by six treatments; analyses 6 and 7 . of a substance prepared -en trean 
Lnts ; analysis 8 is of a substance dried in «o»o the pre™us ^Lrland. 
dried at 100” ; analysis 9 is a preparation from the amorphous graphite of ">1 n 
the previous preparations having been from the graphite of Ceylon. I hav e also prepai 
the same compound from the graphite of cast u’on. 
Substance taken. 
1. 0-23375 
2. 0-233 
3. 0-24475 
4. 0-27275 
5. 0-209 
6. 0-25275 
7. 0-23825 
8. 0-2555 
9. 0-216 
These analyses correspond 
1 . 
Carbon 60-70 
Hydrogen 1’37 
Oxygen 37*93 
100-00 
Carbonic acid formed. 
Water formed. 
0-52025 
0-02925 
0-51875 
0-03775 
0-545 
0-04175 
0-609 
0*0465 
0-46 
0-036 
0-5635 
0-042 
0-5325 
0-04025 
0-56875 
0-0435 
0-48 
0*0355 
-74 
-80 
’-46 
to the following per-centage composition 
3. 4. 5. 6- '• 
60-73 60-88 60-47 60-80 60-94 
1-89 1-88 1-91 1-80 1-87 
37-24 37-62 37-49 37*19 
•nn 
37-38 
inn-no 
inn-no 
8 . 
60-71 
1-89 
37-40 
inn-no 100-00 100-00 100-00 
9. 
60-69 
1-75 
37-56 
100-00 
