r * ' 
* i ' 
Numb. 489. 
PHILOSOPHICAL 
. . • ’ ji i ! 0 f 1 . VT > 
transactions. 
For the Months of October and November , 1748. 
r •. i’j . . 
■: ' 
I. An Account of the Experiments made by 
fome Gentlemen of the Royal Society, in 
order to meafure the abfolute Velocity of 
Electricity; communicated to the Royal 
Society by Mr . W. Watfon F .R. S. />• 491 
Y \ r • rr 
II. An Account of double Foetus’s of Calves, 
by Monf le Cat, M.D. F.R.S. &c. dated at 
Rouen, Auguft 20. 1748. N. S. Tranf- 
lated from the French by T. S. M. D. 
F. R- S. 
1 > JL 
P-A 97 
♦ III. ExtraB of a Letter from the Rev . Dr. 
Doddridge to Henry Baker F. R. S. con - 
•>Y. ceming 
