Exameii. Qf th:. $tQms{fent fkejR.Socjety from 
- Berne, whereof art account is ghf en inthelafl Tranf- 
aaion : By Frederick Slare M.D.R.S.Soc. 
"jL do find' allpiire M t6 Iiave ^pecificl^^ peculiar 
Gravities to themlelves, and thol^^very differing one froni 
another, / From this hint I foi;merly" endeavoured to difco- 
XeKtjherNatuf^ ( which I found to 
|f^;y;97nd attri Si^rie ) arid bring- 
ing^thern to a Hfdrofiaticd^ I found thefti very differing 
ill thcjlr fpecifick Gravity, and very remote from an equal 
proportion to their bulke of common Stone, when weigh- 
ed in Water. ' After tlielftme manner in drder to the better 
il|(^uf r^ intp the ^J^^alure of this HelvetidhCcmretiort^ I made 
'li^f r ^x^ attempt to com its 'R!elative I^dm- 
Water, havingfirfl: of au fatisfyed my 1^ is a 
certaine Term of Gravity that all true and genuine Stones 
(Jj^\^|itch are a fort of Natural Vitrificdtiom ) do meet iri 
qr a^pivjQ aj^'^f'^That is, that;^^^^ 
^n^pplpSf to real ^tones, that where they decline from 
this, Standard, we have good reafon to queftion thofe Conor e-- 
fl'Qj^Sy. w hether ' they are Stones or no/ The Standard of 
Gravky for i-eal Stones I find to be generally about two to 
one,o^ .th?.coi]^.mon Flmi^^ that is ' the butke of the forhler^to 
ah^^v^' doup^ bulke of the latter, and ^ little itiore. In . 
puf Exame^ of this Comrehohy this Stone was V^ry H^rtf and 
feemirigry ^teavy, but 'being brought to the Hydrojhtkd ^ 
^r^at^^ . It was^ \fer^^^ Spungy,_'for when it lay under 'Water, 
tfaer^jpallecl a ^(S^<i''while' btfdr-e I could Cjear it 'of the lurk- 
ingbuKbles;/ fb'that it gre\^ 'te^Jier, frpBitta^ td^Wffie is 
the bubbles were expeld, and a't "laft arri^e'dliW the Stan- 
dard of a true Stony Concretion^ or rather fomwhat beyond 
it. ' ' 
L This 
