I 352 ] 
If we compare this growth of the frontal bone 
with that of other exojlofes , I believe there may this 
difference be rationally obferved ; that other exnf- 
tofes are generally attended with ulcerous tumors, 
which are for the mofl part cancerous ; and thefe 
may commence at any age. I have now drawings, 
taken from the right hand of a man of yo, which 
reprefent rifings of the radius and ulna , with the fin- 
gers, to a molt frightful degree ; and thefe begun 
but fix years before, and are attended with foul run- 
ning ulcers j and now the bones of the arm and 
hand, on the left iide, are beginning to have the fame 
appearances : whereas the frontal bone of the prefent 
fubjed appears found, as far as we are able to judge 
by examination : nor does there appear the leafl dif- 
pofition to ulceration in any part of it. When this 
is the cafe, the growth generally begins while the 
fubjeds are young ; upon which we fhall be more 
particular a little further on. His fenfation upon 
every part of thefe tumors, is exadly like that of 
every other part of his {kin, having not the leafl 
uneafinefs upon being handled. This poor man 
worked at day-labour in the fields till feme months 
before he came to town. 
Perhaps it may not be improper to lay down the 
dimenfions of thefe tumors, as the cafe is fo extraor- 
dinary ; for the fize of them is almofl incredible : 
but I made my drawing in the prefencer of feveral 
of the gentlemen of that hofpital, who allowed it to 
be very exad, and precife in the exprefiion of the 
parts, as well as in the dimenfions. The vertical 
tumor is about feven inches diameter at the balls, 
where the bony edge is felt, mentioned before, and 
.about four inches high from that edge. From that 
edge. 
I 
