On Dr. MARTIN’s CANCER POWDER. 217 
vent the deplorable cafes that have been mentioned, which 
are often rendered fo by delay or unfkilful management. 
4. It is not in cancerous fores only that Dr. Martin’s 
powder has been found to do fervice. In fores of all kinds, 
and from a variety of caufes, where they have been attend- 
ed with fungous flefh or callous edges, I have ufed the 
do&or’s powder with advantage. 
I flatter myfelf that I fhall be excufed in giving this 
detail of a guack medicine, when the fociety reflect that it 
was from the inventions and temerity of quacks, that phy- 
ficians have derived fome of their moft active and ufeful 
medicines. 
N° XXVII. 
¢ 
Tluftrifime ac celeberrime Societati Scientiarum que 
eft Philadelphiz. 
tok. aD: 
CuristiANus Mayer Ser™ Eleétoris Palatini 
Aftronomus.. 
CRIBENDI occafionem a Cl. D. Ferdinando Far- 
mer oblatam eo minus negligendam putavi quod hac 
ratione aliquantum ref{pondeam honori, quo me illuftriffima 
focietas affecit, cum me in album fuorum fociorum ad 
feripfit. Ex libro Philadelphiz impreflo & ad me tribus 
circiter abhine annis tranfmiffo intellexi non fine magno 
animi mei fenfu, etiam Philadelphiz excoli aftronomiam. 
Libro illo fcriptifque meis aftronomicis infelici incendio 
abhinc biennio confumtis, de novis meis quibufdam in ccelo 
inventis ad focietatem illuftrifimam aliquid fcribendum 
effe, duxi. Speculam novam ad omnes ufus accommoda- 
fam 
