[ 5^3 ] 



Itouiert or Eagle-flone mountain in the Peak, its volcanic origin, p. ^. 

 Jioj/f Major General William. See Ba/e, 



S. 



Schoems Lhbofpermos, a fpecies of grafs In the Weft Indies, p. 19. 



Senjiti've Plant. See Averrhoa Carambola. 



Sepp, See Motacilla. 



Shells. See Comhujlion. 



Smeaton, Mr. See Equatorial Micrometer^ Bafe. 



Specific Gravities, Remarks on, taken at different Degrees ©f Heat, and an ea/y Method 

 of reducing them to a common Standard, by Richard Kirwan, Efq. p. 267. Ufcful- 

 jiefs of a comparative view oi the weights of equal volumes of water, &c. ibid. A 

 capital advantage derivable from a table of fpecific graviiies, ibid. Inilrument for 

 making experiments defcribed, p. 268. Table of fpecific gravities, p. 269. Re- 

 marks and obfervations by Bouguer, Mr. Bladh, Mr. De Luc, &c. p. 270. Advan- 

 tages of this method pointed out, p. 271. 



Sui£i Head and Horns, Account of, found at Alport, in the Parifh of Youlgreave, ia 

 the County of Derby. In a Letter from the Rev, Robert Barker, B. D. p. 353. 

 Place and manner of difcovering them, ibid. Not fuppofed to belong to a very old 

 animal, p. J54. Are of the throftel-neft fpecies, ibid. SctThroJicl-jteJi Herns. Con- 

 jedure how they were depofited where found, ibid. See Larkell. Dimenfions of the 

 horns found at Alport, p. 355. Ditto of a large pair of throftel-nefts horns, ibid. 

 Ditto of the horns of a feven-years old flag, ibid. 



Summation of hfinite Series, Supplement to the Third Part of the Paper on, in 1782, by 

 the Rev. S, Vince, M. A, p. 32. 



Sylvabelkt M. Saint Jacques. See AJironomical Oh/ervations. 



T. 



Telejcopes. See AJironomical Obfervations ^ Wires* 



Tentacula, animals with tentacula confift of an almofl infinite variety, p. 343. 



Terehella, a double-coned one, found by Mr. Cordiiier, at Bamff, in Scotland, p. 343. 



thermometer. See Barometer, &c, 



^hrojlle-nejl Horns, defcribed, p. 354. 



Tvfty a kind of ilone, defcribed, p. 353; 



U. 



Vacuum, Ele»arical Experiments made In order to afcertain the non-condu£Kng Power of 

 a perfca one, &c, by Mr, William Morgan, p. ^-jz^ Conclufion drawn from Mr. 



Wallh's 



