( )^ 
Jii ExtraB of a Latin Epijlle ofpr. Joel Langelot, Ckief Phyfttu 
to the Du\e oj Ho\ltcin now l^ef/nt: Wherein u reprefented^ 
that by thefe three chymcal Operations^ Digeftioo, Fermcntatu 
mn, and TriturCj or Grinding^{hitherto, in the Authors opinion 
not fuficimtlyite^arded) many things of admirable ufe may be pers 
foi med. Engl?Jh*d by the Publtjher^ 
A Fter that this Le^^rnd and Experienced Phyfitiari and 
Chymift had often with himfelf confider what thcRear 
fonm ghtbe. Why the chief Ghymica! OperacioDs had been 
hitherto conternned^and by feme reputed even forChina^ra's- 
he^ fEiins to have found atlaftj that the true caufe thereof is^ 
that the Artifts have not made ufcy as they ihould, ofthofe 
means and ways^ chat would have made them fuccefleful^ 
Mow ofthofe means heailurethby his own certain expcri: 
ence thefe three to be the moft eminent and the moft admira- 
ble for ufe^ viz.. Vigejlton^ Fermentation^ and Triture ope- 
rations fiifficiently difcourfedo^ but, in his opinion^ little un- 
derftood as to their efficacy and ufefulnefs^ which he here un- 
dertakerh to make out by fome confiderable and un^common 
experimeots 5 thereby to encourage thofe that are ftudiousof 
Ghyaiiftr}^and:to keep them from defiftiog when they ftould 
moft purfue their work^ as alfo from defpairing of the fuccefs 
of this or that Operation though in appearance dubious^ 
Fir ft then he Jhews the excellent ufefulnefs of Digejlion in 
^ r t • u , , Preparation of the Felatil 
* Compare herewith, what our Noble e /* / -r. * i^i luu- ^ 
P'^ilofopher, ^ohert Boyle, many jears ^^^^ ^/ ^^rtar. Where faa- 
pi^bli/h'd of the great Ufe ving mentiou'd the difficu!- 
of Digeftions, namely in hisJUIlory of r,>clinrl nn^.i/^^^f f ? f • 
JF,W/ieyancl Firmmfs, the firft part, ^^^^ ^"^^^Celsfulnefs 10 0- 
Seaion nth. printed in toncfm i66u a- ther Pr.ocefles- trved bv him, 
inong other Fhyfioio^icai £fays, where he aflures 135 That fonn a 
he faith : Trss. Intim.tion J ft: ^11 add for V 7> t. lOOD 2S 
the fake of Fkilofophert, that barely ^j' long Itiade Ule of 3 Ung Digep- 
DlgemonsCa^fd much more if they he help^ on he fuCCeeded fo ^tW that 
txaSily flop Vefds, and a due degree of ^^^Y he obtalQ- 
heat there ^ay he made h the parts of^- ©d^ what he feared he fllOuM 
»y Bodies,, hoth Ve^etahle and Antml. fo^ r^^t K-,.,,^ U 
great a change from the flatt of conflftaL f ^'^^^ gotten by m^ny C(r^ 
tothatofTluidlty.a^thQfe that- cmenHng mbmous whicHwaS, Z pUtC 
themfehes with crdimrycotirfesofdmi^ vehxte Vf\}cir\\ Tflr^r 
firy, ba^e n.t had a peculiar cmlL for T . l \ ^ T^'V ^' 
tryalsofthi^mture^-epillnot he fo'r^ardto i^^vmg behind a feW, qUfte 
.2?fSieTel7'' '^^^^'^'"^ ^^'^^ infipid^^^/ of aa earthen co- 
