C 76 ) 
2. TraBatm dd Salis Cathartici amari in aqnis 
Ebefliamenfibus 1^ hujnfmodi aliis contenti 
Natura ufn. Aut. Nehemia GrcW5M.D. 
Utriufque Reg. Soc. Soc. Lo^d. Impmfts 
S. Smith & B, Walford. hi 1 2^ 
THE Learned Author of this T^'earife, having 
found by his own Experience, nr--^ rhatof many 
other Eminent Fhyficians in Londoji^ tr manifold Ufe 
of the Purging Waters near E^m^vA crhers of the fame 
kind ; as alfo of the Biner Purging Salt contained in rhefe 
Waters,- concluded the giving a Pub!ick Account hereof, 
would be a Work not unacceptable to Phyficians re- 
mote {xomLondoHf whether '\n Erigland or elfewherej 
to moft of whom this Medicine hath hitherto bcea a 
Stranger. 
The Book it felf is divided into Two Parts. The 
former, of the Nature of the Purging Waters, and of 
the Purging Salt therein contained. The Jatter, of their 
Ufe. 
The former hath Six Chapters. The Firft fliews 
how thefe Waters came to be com.monly known and 
ufed. The Second fhews the Nature of the Waters. 
* The Third, the Nature of the Purging Salt of thefe 
Waters. Where, among many other Experiments, it 
is obferved, That the Cryftais hereof, when permitted 
to fhoot at a due diftance, are moft of them Reftan- 
gular Prifmes with four Parallelogram Planes. By which, 
and divers other Properties, it is diftinguiftied from all 
other Salts. The Fourth fhews the ditterencc between 
this Salt and AUora ; and that the Waters are falfely fup- 
pofed by many to be Aluminous. As alfo between 
thisXand Common Salt,- although fome quantity of 
Common 
