C 570 ) 
^oyal Society, Feb. 28. lafi: and. it was found that thr 
Pyrmont Waters gave a much brighter TitdSure with Gatls 
and Tea, and had a much more exalted Cbalybeac Tafle 
than the Spaw; and a [mail ^antity of each being kept for 
fome time in Bottles, to compare them, the Pyrmont was • 
found to have retained its Virtues much better than the 
Spaw. The Vrefident^ and feveral of the Members prejent, 
'having drunk a Glafs of it, found it of a very agreeable Re- 
difh, and to fit eafie on the Stomachs 
rV. ^emarkg on the fecond Taper in the fdiflory of the 
^oyal Academy of Sciences ^ for the Tear 171 u 
concerning the Caufe of the Variation of the Taro» 
meter ; to fhew that the Way of accounting for it 
in that Taper is injufficient^ and that the Experiment 
made u/e of to prove mhat is there ajferted, does 
no way prove it, TyJ, T. Defaguliers, M A, 
F, % S, 
The Paper is as fo Hows, 
* T T appears by the Barometer, that when it rains, 
* or a little before Rain, the Air commonly be- 
‘ comes lighter. 
‘ That it mull rain when the Air becomes lighter it 
* is eafie to imagine ; for the imperceivable Particles of 
‘ Water, that fwim about in the Air in prodigious 
Quantity, not being fiiificiently fuftain’d when tlie 
* Air has loft a pertain Degree of its Weight, begin to 
‘ fall, and feveral of them joining together in the Fall, 
* make Props of Rain.« when about half of tlie 
^ Air is drawn out of the Recipient of the Air-Pump, 
: (and 
