ME D ICIN A. Thofe Letters came accompanied with a Syncpfts in 
Print, giving a brief Account of the Contents of the faid Trcatik, to this 
effed:, vizi 
That this hath composed a ^jy?^;;? of Natural Phiiofophy by Ob- 
fervations and Experiments, accomodated to the benefit of Humane Life, 
and fubfervient to P^/r^^and other fuh alternate Arts-, which Phiiofophy he 
pretends to have raifedon Vr'mciples^ that are certain Bodies drawn out of 
Mixts -^wliKh^ though in themfelvcs invifible and incoagulable, yet be- 
come,according to him,vifible by their Contrariety and mutual Operation 
upon one another, and fo do confticute the Temperaments of Concretes, 
and caufe not only their Diflbktion, butalfo their Redintegration, 
Thefe Principles he undertakes to prove to be T mo Salts, call'd by him 
Acidum and Salfum-^ which, as they work more or lefson one another, 
when blended, fothey lofemoreor lefs of their Volatility, and the degrees 
of their contrariety : And from their various Complication (in which he 
places the whole bufinefs and moment of Phiiofophy) he holds, that that 
great Multiplicity of Concrets, which is in the Vniverfe ^docs refulr. 
In Particular he deduceth from the faid Principles the caufe of Ferments 
and their Variety, the nature of Generations^ Concretions^ pHtrefaElicns, Pre^ 
eipitations, &c. andlheweth, how thofe Principles run through all Minerals, 
Vegetables ?in.di Animals, by their manifold combinations, and various wayes 
of ading on one another. 
He explains alfo the Mixtures of Alkalys^ Vitriols^ Armoniaks, Sulphurs^ 
Mercuries^ and explicateth the Properties of Dijfolvents^ as alfo Tafis^ 0- 
dors. Colors^ Sec, all from the fame principles. 
And having raifed this StruAure of his, as far as he judgeth it fufficient for 
Stihordinate Arts, he proceeds to adapt it to the Anof'PhjJick, And ap- 
plying it to Bodies, he thence drawes the Diverfity of Humors and 
Tempers, the Begining and Durtition of Vital Heat,the Motion of the Limbs, 
the Faculties of Entrals, the Origin, Vitality and Properties of the Blood, 
and the various Fermentations therein • fiiewing the Diftempers of the 
Ferments andjuycesin Animals, the nature of Coagulations, DifTolutions, 
Fca vers and other Symptoms ; as alfo the Original of Poyfons in Animal 
Bodies; concluding with an Indication of the proper remedies (as he con- 
ceives) of many Difeafcs. 
whether this Phiiofophy be^QVl , ueajleto fudge. 
A Note to he infer ted above ^ pag. 5 44. after lin, 12. 
THis R£j?( by Mr.l/oo^jfuggeftion ) may be rendi ed more convenient, if, inftead 
of placing the Screw Hori\ontdi it be fo contriv'd, that it may be laid parallel to the 
Jlq nno^Uly or to the Diumxl motion of the Earth. For by that means the fame thing may 
be perfovm'd by the fingle motion of one Screwj which in the other way cannot be done, but by 
the turning of tcifl) Screws ; As will eafily appear to thofe that lha'Uonfider it. 
Jn the S A r O T: 
Printed by T. N. for fohnMartyn^ Printer to the Royal Society^ and arc 
to be fold at th€ Bell a little without Temple-bar- i66y. 
