I90 M E M O I R S of the 
Amongft thofe juices, that coagulate and are clammy, there are 
fome which readily break wirh whey. 
In the middle of ^v/), Dr. Lifter drew and gathered of the 
milk of La6hica fylv. cofta Jphiofay C. B. which it freely and 
plentifully aft'ords j it fprings out of the wound as thick as 
cream, and is ropy and white j and yet the milk, which came 
cut of the wounds, made towards the top of the plant, was 
plainly Iheaked, or mixed with a purple juice, as tho' one had 
dafhed or fprinkled cream, with a few drops of claret j and the 
Ikin of the plant was thereabouts purplifh, poiTibly with veins: 
A'rain, it turned ftill yellower and thicker in the fhell into 
which it was drawn, and by and by it became curdled, that is, 
the white and thick cheefy part was feparated from a thin 
purple whey ^ in like manner, the blood of animals, whilft 
warm, continues liquid and uniform, but asfoon as it becomes 
cold, it cakes, and has a Serum or whey, feparated from it; 
alfo the cheefy part of the milk of animals is glutinous and 
Itringy; further, this Serum came freely from the other, by 
fqueezing between the fingers, and the curds, walhcd in 
fpring water, became tough, and continued ftill white and 
dry ;'as for the purple whey, after ftanding a day in the fun^ 
it became ftiff and hard, and was eaiily formed into cakes, 
which were very brittle, and would eafily crumble into pow- 
der. About 'December following, Dr. Lijfer broke one of the 
cakes made of the cheefy part of the milk of this plant; and it 
then proved very brittle, and fhione, upon breaking, likerofin, 
of a dark-brown colour ; befides, it burned with a lading flame, 
and melted by heat; it would draw out into long tough firings, 
like bird-lime; on the contrary, the purplilh powder, which 
was the whey, if put into the flame of a candle, would fcarcely 
burn at all, but foon become a coal; laftly, the purple powder 
tailed very bitter, whereas the cheefy part was as infipid as 
wax. 
The milk, which the "frachelium kind plentifully yields, is 
very thick and prefently curdles, the ferous part or whey, 
being of a brown colour; thefe juices fmell four, fomewhat 
like the flices of green apples, which have been long cur. 
The thin milk o{ "ft thy mall us bcliofcopiuSy Ger. runs out freely 
and plentifully; it is very clammy upon the fingers, and very 
white in drawing; it turns upon a lancet of a dark blue, and 
fl-;ews of the colour and confidence of blue fkimmed milk ; 
made up with wheat flower into cakes, it appears grealy or 
oily, and fcarcely ever becomes dry ; it breaks, or coagulates, 
with 
