39 1 
XXII. Experiments and Obfervations on the Matter of Cancer 9 
and on the aerial Fluids extricated from animal Subfances by 
Dif illation and Putrefaction ; together with fame Remarks on 
fulphureous hepatic Air . By Adair Crawford, M, D. F. R. & 
Read June 17, 17900. 
^T^HRRE are feveral varieties In the colour and Confidence 
A of the matter difcharged by cancerous ulcers. It is in 
fome cafes of a pale afh colour; in others, it has a reddifh 
caft ; and in many indances it has more or lefs of a brown 
tinge, fometimes approaching nearly to black. Its confidence 
is for the mod part thin ; but in the cancerous, as well as in 
other malignant ulcers, we frequently meet with a white fordes P 
vvhiCii cloiely adheres to the furface of the fore, and which 
appears to be fcareely mifcible with water. In the fame pa- 
tient the appearance of the difcharge is frequently varied by 
internal remedies, or by external applications; but If we ex- 
cept the temporary variations produced by accidental circum- 
ftances, the cancerous ulcer is, in its advanced dage, very ge- 
nerally accompanied with a peculiar odour more highly fetid 
and offenfive than that which is emitted by other malignant 
ulcers. 
It is well known, that the cancerous matter occafions by its 
abforption fchirrous tumors of the lymphatic glands conti- 
guous to the parts alfedted ; and that it gradually corrodes the 
branches 
