( 34 7 ) 
7 Pounds, indead of 4, feparated the Balls. Having 
found the right Weight afterwards, I made feverai 
Trials, but cou’d not again bring the Force of the 
Contact to be equal to 47 Pounds. How much great- 
er than* 47 Pounds the Force of the Contad was in 
the 5th Experiment, I cou’d not determine, by reafon 
of the above* mention’d Accident j but the Surface 
was much as before. I fhall make fome more Experi- 
ments of this Kind, and if lean come to any Certain- 
ty in the Meafure of the touching Surfaces, and ut- 
raoft Force of the Cobefion ; 1 will communicate the 
fame, and repeat them before the Society. 
VIE ExtruEi of federal Letters and Certificates 
Jent to bis Majefty the Ifing of Great Britain, 
concerning a Very particular Ncevus Maternus, 
or Mole. Communicated by Dr, Steigertahl, Lby- 
ftcian to bis Majefty, F. R. S. 
J E R E M I A S Rudolph von Waltha-ufen , a Captain 
of the Garrifon at Danneberg , near Lunebourg , 
was born OSober 24, 1680, w.th a very Angular 
Mole upon his right Arm, Shoulder, and Hind-part 
of his Side, not unlike the Branch of a Vine, with 
its Leaves and Grapes. It hath been affirm’d and 
atteded both by the Deceas’d himfelf, and feverai of 
his Relations and Friends, that his Mother, when 
big with Child, had an earned Defire for Grapes, 
and impatient to day, till they were full ripe, went 
down into the Garden to pull off fome of thofe un- 
ripe } whereupon it happen’d, that a whole Branch 
with its Leaves and Grapes fuddenly fell down upon 
C c c her 
