( 799 ) Mmt.iii. 
PHILOSOPHICAL 
TRANSACTIONS. 
Februixr. 26. i 67f* 
77 
The CONTENTS. 
J Continuation of ikfr.Boyle'i Experiments^fublifbedin the next 
foregoing tra£f^ about Fluids contiguous to other Fluids. An Ac- 
count of tm Books: I.PAL^OLOGIA CHRONIC A.drc^ 
b^ Robert Cary,D.LL^ II. J iOUCH-StONE for Gold 
a^d SilverAVares ^ejrc, by W. B. of London Goldfmith^ 
A Continuation of Mr.BoyWs Exferimentsfubli^ed in the Up 
Tranfaltions ; for which there was m room there. 
IN the Winter time, and at other times alfo when the Air is 
cold enough, the figure, acquired by the futfaceof an Oil 
contiguous to the Water on oae fide, and the Aironiheother^ 
may be preferved from varying, and fo may beat leifureob* 
fcrved by the Dirediion afforded by the following Experiment^ 
which I devifed for this purpofe. 
In Cold weather we cook EflTential Oil of Annifeeds^ whofe 
property it is to coagulate in fuch weather,and having 
in a gentle warmi h brought it to be fluid , we poured Exp.xiv 
it inco a flender Vio! more than half filled with Com- 
mon water, that had been alfo a little warmed, that the Oil 
might not be too haftily reduced to its former ftate. This Oil 
being lighter than fo much Water, and beingpourc/l on in a 
convenient quantity, had its upper furface fomewhat concave, 
as that of the Water v/as ; but the lower furface , furroundcd 
by the Water, was very conveXjappearing almoft (for it was not 
pcrfeaiy j of the figure of a great Portion of a Sphere. This 
being done, the Viol was ftopt^and fufFered to reft for fome time 
in a cold place, by which means the Water continuing fluid as 
before, the 0//^/ Annifeeds wzs^ as I cxpeaed,f(i)und coagula- 
ted in a form approaching to that it had whilft inafluid ftate; 
i i iiay*5ipproaching, beciiufc it was not eafie to difcern the exaft 
t^jni^h SM Figure 
