[ 43 ° ] 
in 1720, and frnce in Mr. Cotes’s Hydroftatical and 
< Pneumatical Lectures, when they were publifhed 
at large in 8°. by his fuccefTor Dr. Smith , now the 
Worthy Matter of Trinity College. In thefe printed 
Le&urcs were inferted the gravities of Human Blood, 
its Serum , &c. from Dr. Jurin , inftead of thofe 
that had before been made ufe of from Mr. Boyle. 
Mr. Francis Hauksbee , n6w Clerk to the Royal 
Society , did, about the year 1710, begin, in con- 
junction with Mr. Whijlon, who had then newly 
left the Univerfity, to give hydroftatical lectures &c. 
in London , for the purpofe of which he reprinted in 
a thin volume in 4 0 , in which are the fehemes of 
his experiments, Mr. Cotes s table of Specific Gra- 
vities above-mentioned. To which he added, 
from tryals of his own, the weights of Steel, foft, 
hard, and temper'd, which are printed with his name 
in the following Tables, as are alfo fome other ex- 
periments, which he has fince occafionally made, 
and communicated to me. Mr. Cotes’s table, with 
the abovc-mention'd additions of Mr. Hauksbee , 
was afterwards again publifhed by Dr. Shaw , in his 
Abridgment of Mr. Boyle’s Bhilofophical JVorks , at 
London, 1725, 4 0 . vol. ii. p. 345. 
John Freind M. D. at the end of his Braleffiones 
Chymica , printed is. London in 1709, 8°. has publifhed 
fome new tables of the Specific Gravities both of fo- 
lid and fluid bodies, entirely taken from his own ori- 
ginal experiments. And as thefe tables contain an 
account of a very ufeful fet of bodies, upon which few 
or no other experiments have been made: it is great 
" p^y 
