OF THE PRINCIPAL POISONS, ORGANIC AND INORGANIC. 
m * 
375 
It will be observed that some of the poisons in class 3 (digitaline, picrotoxia, 
and solanine, in the first group, and codeine and cryptopia, in the second) have 
appeared to melt and sublime at the same temperature. They have seemed to 
melt and then sublime, with a scarcely appreciable interval. As there is not appa¬ 
rently even the small difference of 10° shown in the case of morphine, they have 
been grouped as above. Of solanine it may be stated, that it darkens, and 
grows almost black, before it melts. 
I will now give brief notices of other experiments made with the apparatus 
above described, and then bring the paper to a close by presenting a tabular form, 
embracing the principal poisons which we encounter as white powders or colour¬ 
less crystals. 
1. Oxalate of ammonia yields sublimates at 230°, and is wholly dissipated by 
heat. 
2. Binoxalate of potash yields sublimates at 280°, and leaves a white ash. 
Camphor sublimes at 150°. 
Cyanide of mercury begins to sublime at 320°. 
Oxide of antimony sublimes slowly and scantily at 480°. 
Tartar emetic decrepitates at 380°, sublimes slowly and scantily at 480°, and 
chars at about 550°. 
Sulphur melts and sublimes at 180°. 
The volatile metals crushed into coarse powder sublime as follows .— 
Arsenic . . ... . . .at 230° 
Selenium.,, 350 9 
Cadmium . . . . . ,, 480 9 
Tellurium.,, 500° 
Table showing the approximate results, for the principal poisons, of sublima¬ 
tion at ascertained temperatures 
Temperature. 
ing white vapour. 
-~ --- 1 
is wholly dissipated. 
4. Melt, change colour, 
sublime, and depc 
carbon.. 
Sublime. 
C Corrosive sublimate . 
• • • 
. 200° 
\ Cantharidine . 
1 Calomel . . . 
. 240° 
(. Arsenious acid . 
. 280° 
*N 
Sublime. 
Melt. 
> Oxalic acid . . 
• • 
. 180° 
280° 
) 
Melt. 
Sublime. 
(Morphine . . 
. 330° 
340° 
"1 Strychnine . . 
. 345° 
430° 
/Aconitine . . 
. 140° 
400° 
Atropine. . . 
. 150° 
280° 
Delphinia . . 
. 150° 
300° 
Veratrine . . 
. 200° 
360 a 
| Brucine . . 
. 240° 
400° 
Digitaline . . 
. 310° 
310° 
Picrotoxia . . 
. 320° 
320° 
^Solanine. . . 
. 420° 
420° 
/Tartar emetic . 
380° 
480° 
550° 
chars. 
