e linteo in ollafn novaiti ftfinorem remove ^ fuperfuhde 
poftea fpiritus falis comm. ^ii. vel siii. 6c ftatim 
apparebit color casruleus puleherrimus: quas probe 
mixta per nodem quiefcant, quo fado aquas pluvialis 
raagna quantitas addatur, in gyrum moveatur fpa- 
thula, 5 c pofteaquam refedit materia, aqua decantetur, 
5 c recens aqua fuperfundatur, 5c eoufque labor rei- 
teretur, donee omnis acrimonia fit defumpta, & aqua 
infipida defluat ^ hoc pado prascipitatum tuum fumme 
casruleum linteo expanfo ingere, ut aqua diftillet, 
fenfimq^ color calore leni exficcetur ufui. 
N. B. Calcinatio magni momenti eft in hoc opere, 
mm color cyaneus 5 c casruleus obfeurus ortum fuum 
trahit a calcinatione levi, mediocri, 5 c forti fanguinis 
arefadi cumfale Tartari, 5 c inde diverfitas coloris. 
Lixivia ferventiflima uno eodcmque feftinatiflimo 
adu funt confundenda. 
f ... . . , . 1 , 
vJ- *■ :t | 
— - — i — --■■■ i . ■ ■ * : — -- - - - - 
* 
V. ObferVations and Experiments upon the foregoing . 
Preparation. [By Mr. John Brown, Chymift y 
r 
D R. Woodward having lately communicated a Pa- 
per (which he receiv’d from another hand) to 
this Society, containing a Procefs for making the 
Fruffian Blue. I was willing to go thro' it exadly, 
according to the Proportions there preferib’d- andob- 
ferv’d that by a Calcination of 3 4 of Blood dry’d, 
with 5 4 of Sal Tartar i y in two Hours time that 
Part of the Operation was over, and. a black fpongy 
Subftance remain’d in the Crucible weighing 54. a 
Diftolution of which being made in boiling Water and 
afterwards flkred, the Remainder, when dried, weigh’d' 
Vol. XXXIII. D 9 Drachms, 
