( 1014 ) 
Another lump of the lame Craffamentutn being weigh’d 
in the fame manner, its Specifick Gravity was Ic8^.9. 
Sept, 1 8. 1719. I found the Spec fick Gravity of 
another piece of Cra(famentum to be loSx.i. 
A fecond piece from the Blood of a different Per- 
fon gave me 1086,1. 
A third from the fame Perfon gave 1086,6. 
From this it follows that the Specifick Gravity of 
the Blood Globules is at lead 1084, whicli is the 
Medium between thefe five Experiments. 
But if we allow one half of the bulk of the Crajfa- 
mentum to confifl: of Serum^ filling up the Spaces be- 
tween the Blood Globules, we fhall find their Spe- 
cifick Gravity to be 1138. 
From this we mud make a fmall abatement, becaufe 
fome part of the Serum mud have been (quees’d out 
from between the Globules, by their yielding to one 
anothers Preffure, when the lump of (Cra(famertum lay 
upon the Paper : and this will reduce their Specifick 
Gravity fufficiently near to ^I^6, as we had before 
determin’d it. 
IV. Jn Accomt of the Sunk Ifland in Humber, 
fome Tears fince recover’d from the Sea, (Being 
an ExtraH of a Letter Communicated to the 
Royal Society hy John Chamberlayne, 
R. S. S. 
T His Idand goes by the name of the Sunk 
fo called 1 luppofe from the finking Marlh Ground 
about it. As for its Original, one may make pretty 
dire Conjecdures of that I believe, becaufc ’tis yet with- 
in 
