[ 10 66 ] 
the limits of algebraical equations ; and a general demonftration of Des Cartes’s 
rule for finding their number of affirmative and negative roots, p. 380-— 388. A 
method of finding, by the help of Sir Ifaac Newton’s binomial theorem, a near 
X OC ^ OC ^ 
value of the very flowly converging infinite feries x -f- -j- -)-• — + "T Hb “T 
&c. when x is very nearly equal to 1, p. 895 — 901. A method of extending Car- 
dan’s rule for refolving one cafe of a cubick equation of this form, x 3 * qx~r, to 
the other cafe of the fame equation, which it is not naturally fitted to folve, and 
which is therefore often called the irreducible cafe, p. 902 — 949. 
Amalgam of zinc, on its ufe for the purpofe of electrical excitation, p. 861. 
Amfierdam , the proportionable number of inhabitants that die there annually, p. 154. 
Andernach , vaft quantities of tuffa there, p. 5. It produces a confiderable trade between 
that town and Holland, p 6. 
Anderfon , Mr. his account of a large ftone near Cape Town, p. 102 — ic6. 
Animals. Of the heat, & c. of animals, p. 7. The more perfect animals have the 
greateft power of retaining a ftandard heat, p. 8. They vary from their ftandard 
heat by external applications or difeafe, p. 8 — 3 3. Experiments to find the differ- 
ence in the quicknefs of the tranlition of heat and cold in living and dead parts, 
and if the latitudes to which each would go were different, p. 13, &c. Parts of 
an animal capable of becoming much colder than the common or natural heat, 
p. 14, 15. The fame parts capable of becoming much hotter than the ftandard heat 
of animals, p.- 15 — 17. Adtual heat increafed arid decreafed by the application of 
external cold ; and the heat varied according to the powers of life, in the fame 
parts, and in different parts of the fame animal, p. 17 — 19. Every part of an ani- 
mal is not of the fame degree of heat, p. 2 1—23. Fowls Tome degrees warmer 
than quadrupeds, p. 23—25, Imperfect claffes of animals capable of varying their 
heat to that ftandard which can Freeze the folids or fluids when dead, p. 2 5 — 27. 
Experiments to determine what degree of heat imperfedl animals cdiild be brought 
to, p. 27, 28. To determine whether life has any power of r eliding heat and cold 
in thefe claffes of animals, 28. Power of reflfting heat and cold e Efts in animal 
fubftances devoid of apparent organization and motion, p. 28 — 30. Remarks on 
the foregoing experiments, p. 30—33. Experiments in freezing parts of animals, 
with a view to fee if they would be reftored to the actions of life when thawed, 
p. 34 — 33 . 
Animal exhalations, experiments to find their effedls upon air, p. 199 — *201. 
Antients , their opinions concerning the communicating of motion to bodies, p. 344, 
&c. 
Antirrhinum Jlo^wers, the effedl of their eflluvia upon air, p. 202. 
Antifeptic Regimen of the natives of Ruflia, concerning it, p. 622. The habitation and 
manner of living of a Ruffian boor defcribed, p. 623— 627. Their manner of pre- 
paring 
