r N' D E X. $05 
Ptarmigan. See Lagopus. 
Purjleet. See Powder Magazines. 
R. 
Record , to, in birds, is an attempt to fing, p. 250. 
Reproductions. See Sea Anemonies. 
Ftoberifon, Mr. John, his introdudion to a paper of the 
late Mr. Jones, on conic fedions, p. 34.1. 
Robin , educated under a nightingale, p. 257. And under 
other birds, p. 2 58. 
Rofe. See Mountain. 
S. 
Sachem, or chief Magiftrate, of the Indians of America, 
p. 144, 145. 
Salts , their comparative effeds upon the red particles of 
the blood, p.317. 
Safnfiite. See Denarius , Meddix. 
Sap , new experiments, which prove, that it does not cir- 
culate in plants, p. 127, &c. 
Satellites , of Jupiter, means of improving their theory, 
p. 185. Reafons of the uncertainty in the obfervations 
of their eclipfes, p. 186, 187. How to be remedied, 
p. 188, &c. 
Sea- Anemonies, what animals they are, p. 363. Reafon of 
their name and different fpecies, p. 364. Their re- 
produdions, p. 369. Bear great colds, p. 377. How 
affeded by heat, p. 37 9. Can live in a vacuum, p. 380. 
And without food, p. 381. Are very voracious, 
p. 382. Do not feed on one another, p. 383. May 
be eaten, p. 383. Belong to the clafs of the Adi ni as. 
P*/r°3* 
Serum, its power in preferving the red particles of the 
blood, p. 317. 
Singing. See Birds. 
VbL. LXIII. Uuu Sly-lark, 
Uu u 
