C 419 3 
Fig. 6. 
The Stone of Antony Germain , of half its natural Size, 
view’d by its pofterior Surface, which lay on that 
of the Bladder reprefented by Fig. 5. 
E, The pofterior End of the Stone. 
F y The anterior End anfwering to the Neck of the 
Bladder. 
ggy The circular Furrow rematk’d above. 
N. B. The Catheter, Tab. IV. Fig. i. and 2. is figured, and a Ihort Account »Iven 
of it, in the Med. EJfayt, Vol. V. p. 4.66. M- 
XII. AbjlraEl of a Letter from Monfieur De 
Bozes, Profejfor of Experimental Philo - 
fophy , at the Academy of Wirtemberg, to 
Monfeur De Maizau. Communicated by 
Mr. Baker from Mr. Ellis, and tranfated 
out of the Latin by Mr. Baker. 
*WMay23. x< a Hollow Globe of Glals, of Ex or 
1745 LjL e ight Inches Diameter, being 
fwiftly turned round upon its Ax ns, by means of a 
large Wheel, in the Manner Mr. Hankesby formerly 
advifed 5 and being rendered as ele&rical as poftible 
by the Application of a dry woolen Cloth, or rather 
of a very dry Hand } if, whilft in this fwift Rotation, 
it be brought near the End of an iron Bar, fufpended 
by Strings of Silk that are exceedingly well dried, 
fuch an ele&ric Power will be communicated to the 
the Iron, that, upon touching the other End of it 
with one’s Finger, not only Sparks of Fire, in the 
ufual 
