312 M E M O I R S ?/*//&(? 
mentedit ; the fpirit of wine did not extract any tin£lurefrom that 
refidue : One may conclude by all thefe experiments that this wa- 
ter has not any acidity, that it does not participate of vitriol nor of 
allum, and there is in it but a little quantity of the white earth, 
and leVs of fait which is very like fea-falt^ the parts that fhew 
themlelves in the mixture of the lime-water, ^c. are the earth 
and fait of fixed or volatile Akalis 5 thefe are the fame parts 
which begin that flight fermentation by the mixture of acid 
fpirits^ but that fermentation is imperfect becaule of the little 
quantity of earth, that is drowned in ib great a quantity of li- 
quor; indeed when the water is evaporated,, the acid fpirits fer- 
ment very much with the refidue : It appears by the Imell of that 
water that it contains a fulphur very fubtile, which diffipates it- 
felf very eafily and is not ienfible in the experiments ^ the effects 
which areafcribed to that mineral water, as of relieving the pal- 
fy, ^c. is neverthelefs owing to this fulphur 5 as alfo its being 
ufed with fuccefs in other ibrts of nervous diftempers, in fliortnefs 
of breath and all diforders in the lungs, and in remedying many 
other infirmities that are caufed by fharp ferments, which this 
water fweetens; and as to its other properties, as purging, tem- 
pering the hot intrails, ^c. it may have the fame effeds with 
common water when drunk plentifully : One may drink many 
glafles of this water, beginning with 4, 5 or 8 every morning, 
and augmenting to 12, 18., 20 or more, according as the ftomach 
is well able to bear it 5 this water pafTes readily by urine, and 
many perfons are purged by it ^ fometimes one may mix with it 
fome diuretic fait to make it pafs the more freely and remove the 
more obltra^lions • 'it other times one may put Manna or fuch 
like for making it the more puroative^ and one may wafli alfo in 
the mud of that fountain according as he has occafion. 
Some E:<perimcnts and Ohfervations concerning Sounds 3 by 
Mr. Walker. Phil. Tranf. N° 247. p. 493. 
MR. Walker provided a pendulum of fma]l virginal wire 
with a piftol-bullet to the end of it being 9 fo inches long 
to the middle of the bullet, which had two vibrations in a fecond 
of time, he took his pendulum and (landing over againft a high 
wall he ciapt two pieces of fmall boards together and obferved 
how long it was ere the eccho returned, and he removed his fta- 
tion 'till he found the place to which the eccho returned in about 
half a fecond; but that he might diflinguifh the time more 
nicely, he ciapt at every fecond of time, 10 or 1 5 times toge- 
ther; fo that by this means he could the better dilcover whether 
the 
