C 2417 ) 
POSTSCRIPT. 
I have fince repeated the fame Experiment with the like 
Succefs as before. And to try how agreeable it would 
anfwer all manner of ways, I caufed the fame two He* 
mifpheres to be exhaufted of their Air, and then found 
that the like weight was requir’d for their Separation, as 
when the additional Atmofphere of Air was thrown on 
their outward Surfaces without withdrawing the included. 
And farther to confirm the fame, I not only caus’d the in- 
ward Air to be withdrawn from the Hemifpheres, but 
then being included within the Receiver, I likewifc caus’d 
the fame Quantity of Air to be injefted on their outward 
Surfaces, as in the former Experiment, and then found that 
080 /• (which was double the weight before requir’d) did 
not feparate them. I was unwilling to add more (tho’ I 
knew a final! Addition rauft have done it) fearing the 
breaking fome of the weaker parts, which I thought were 
in danger by the fall of fuch a Weight : The Experiment 
being apparent and fatisfa&ory without it. 
