CONTENTS. ¥ 
On the real Origin of that Refin known under the Name of 
Sandarac, and-that of Gum Arabic. By M.ScHOUSBOE 
Page 239 
On the Peftilential Difeafes which, at different times, ap- 
peared in the Athenian, Carthaginian and Roman Armies, 
in the Neighbourhood of eee @. By thé late ok. Sr 
Smitru, Phy/ician 
Obfervations on the Art of Scouring di iforent Kinds of Stuff 
By C. CHaPrTaL 26% 
Defcription of some Biuprduements died abe by Mr. JAMES 
Burns, of Gla/zow, applicable to Fire-Grates, Stoves, 
&c. by which Rooms and Halls of every De/cription may 
be heated more fpeedily and effectually, and with a fmaller 
Wafle of Fuel, than by the’Methods now in Ufe - .264 
On the Chemical A&ion of di ifferent Metals on each other at 
the common hi sah of the oer By C. Faz- 
BRONI - 268 
On the Art of Hardening Capes By P. i HseEwtM = 271 
Experiments on the Nature and Properties of the Pietra Ae 
gaja, Lapis fungifer. By P. A. GADD - 
On the Volcanic Tfland thrown up in the Ne awe 0. 
Iceland. By eg Von HOWSASEN, of the Danifh 
Navy - - - 280 
te cass on fome ‘peailian Matters dah from Animal 
Subfbances treated with the Nitric Acid. By C. WEL~ 
TER ~ 286 
Refleétions on the Gakhiy of Earthen Wate. and the Refults 
of the Analyfis of fome Earths and common Kinds of 
Earthen-Ware. By C. VAUQUELIN 288 
A Communication from GEORGE PEARSON, M. D. F.R.S. 
&c. Phyfician to St. George’s Hofpital, &c. concerning 
Eruptions refembling the Small-Pox, which itive ap~ 
pear in the Inoculated Vaccine Difeafe = 13 
Obfervations refpecting the Earthquake which pay place im 
Peru in the year 1797. By M. CAVANILLES 318 
Experiments to determine the Quantity of Tanning Principle 
and Gallic Acid contained in the Bark of various Trees. 
By Georce Bieein, E/q. 321 
Extra& of a Memoir on the Grecian Method of dyeing Cotton 
Yarn Red. By C, FELIX 325 
An Account of “th Wild Hoge in Spaniph Agere wis 
D. FeLix AzARA 339 
An Account of the Pearl Fiery i in the Gulph of Manar, in 
March and April 1797. By Hunry J. Le Beck, E/g. 
335 
Account 
