un- 
542 INDEX. 
Qroghan , George, Efq; difcovered the bones of fome 
known animal in North America, p. 464, 465. 
Cryjialhne particles, carried by moifture, coileft in drops, 
and form into maffes, p. 60. More or lefs tranfparenr, 
in proportion as they are drawn clofe together, and free 
from heterogeneous matter, 61, They are probably a 
kind of falcs, 62. 
Cryjiallifation , different methods produce a varietv in the 
figures of the falts, p. 496. 
Ciyjlals , and lpars formed in caverns, where moifture 
^ defcends through the earth to a void fpace, p. 60. 
Cylinder of g : afs, lined for electrical experiments, becomes 
much more powerful, p. 186. 
D. 
Dalrymple , Alexander, on the formation of'iflands, p. 394. 
Deluge , univerfal, how accounted for by Burner, Whifton, 
and Ray, p. 45, 46. And by Mr. King, 48. 
Derby , cold at this place fuperior to that' of any place in 
England, p. 265. 
Diamonds, why large ones are fo rarely found, p. 64. 
Diofcorides, an Arabic MS. of this author in the Bodleian 
Library, p. 22. 
Dijlillaticn of acids, volatile alkalies, &c. how improved, 
P-517- 
E. 
Eclipfe of any of the Satellites of Jupiter determined, 
P* 37- 
Eclipfe of the Sun, of Auguft 5, 1766, obferved at New- 
foundland, by Mr. Cook, p. 215. At Oxford, by 
the Rev Mr. Hornfby, 216. Of AuguJt 16, 1765, 
at Caen, by N. Pigott, Efq; 402. 
Eggs, their number, in feveral fi flies, how afcertained, 
p. 282. Table of them, 291, 292. 
Ehrct , 
