( Too^ ) 
Colour, inclining fomething to red, and a little Turbid. 
It’s Specifick Gravity was 1019, 7. 
The fecond was likewife a little Turbid, and of a 
pale whitifli Colour. The Specifick Gravity of this 
was 1030, 2. 
The third quantity of Seram was perfedly clear, and 
of the colour of Canary. It’s Specifick Gravity was 
found to be 1050. 
Though thefe five feveral Experiments were all care- 
fully made, and with a Balance whofe accuracy I. was 
well afiur’d of, yet for farther Evidence, I thought it 
proper to make that which iollows, after another man- 
ner. 
Fxp. X. lyth. 1718-9. I drew off* all the 
Serum from five or fix feveral Porringers', containing the 
Blood of different Perfons. This I found to be a lit- 
tle tinged with Blood, which was occafion’d by my 
being oblig*d to draw it off pretty near to the bottom 
of the Porringers, in order to obtain a quantity (uffi- 
cient for my purpofe. For this reafon I fuffer’d it to 
Band about two Days, in which time the Globular 
part of the Blood was entirely precipitated to the Bot- 
tom, and the Seram was become perfeBrly fine and 
tranfparent. I then drew it off with a Siphon into a 
Glafs Vial with a narrow Neck, which 1 fill’d to a 
certain mark made in the Neck for that purpofe. 
This done, I plac’d my Vial in a nice pair of Scales,, 
in which I had a counterpoife for the \yeight of the 
Vial, and found that quantity of Serum to weigh 
Grains. 
^ Then pouring out the Serum, I fill’d the Vial with 
common Water to the fame mark, and found the 
weight of the Water to be Grains. 
From which it follows, that the Specifick Gravity 
of this was 8029,4. 
% 
