Neiu Pitl'licationt, 239 



cfieifteJ by the circulation of its parts. He has fince afcertained, that water, and thence 

 probably all other fluids, condudt that quality or matter by a fimilar procefs ; and from the 

 general fads obferved by him, he concludes that they are non-condu£lors of heat. The 

 experiments contained in this eflay are very ftriking and ingenious, and the author has 

 availed himfelf of them in forming a fet of deductions of great ufe in the explanation 

 of the economy of heat on the furface of the planet we ijihabit. 



Tru'tte de lu Fonte des Miles, isfc- 1 or, A Treatife on the Fudon of Ores by Pitcoal, and the 

 Conilruilion and Ufe of Furnaces proper for the Fufion and Refining of Metals and 

 Minerals by means of Pitcoal. Together with the Method of rendering this Coal fit for 

 the fame Ufes as Charcoal of Wood. By Mr. De Gendane, of the Royal Academy of 

 Sciences at Montpellier, &c. Sold at Paris at the Veterinary Library of M. R. Huzard, 

 Rue de L'£peron-Saint-Andre-des-Arcs, No. 11. 2 volumes in quarto -, the firft con- 

 taining 400 pages, with 34 plates, and the. fecond 534 pages, with 42 plates. Price 20 

 francs for the two volumes in board-s, and 12 francs for the fecond feparately. 

 The firlt volume of this work appeared in 1770, and the fecond, which was retarded 

 at firft to verify certain fafts, and afterwards for other reafons, was printed in 1776. 

 Other circumllances, unneceflary to be detailed, have prevented the proprietor from offering; 



the work regularly to fale until lately. Journal des Mines. 



Aiifa'igsgruiule der Chemie ziim Crundnjfe Accidemifcher Vortefiingen nach dem neuen Syjlimey 

 tSc. : or. Elements of Chemiftry, to ferve as the Plan of Academical Leflbns according 

 to the new Theory. By M. G. Fr. Hildebrandt, Profeflbr of Medicine and Chemiftry at 

 the Univerfity of Erlang. Printed at Erlang 1794, 3 volumes, large oftavo. 

 The celebrated L. B. Guyton, in the Annales de Chimie, XXI. 333, fpcaks very highly 

 of this work, for its order and perfpicuity. The author begins by exhibiting the general 

 principles of mixture, folution, affinity, precipitation, &c. together with the operations of 

 chemiftry. In the next place he treats in feparate fe£lions on caloric, light, oxygene, 

 azote, atmoCpheric air, hydrogene water, the earths, alkalis, acids, and compound falts. 

 Thefe fubjetts occupy his firft volume. — The fecond volume treats of metals, their alloys, 

 and combinations. — And in the third the chemiftry of organized fubftances is explained. 

 Kitizie, (sfc. An Account of the Siliceous Incruftations of the Thermal Batlis of Italy ; 

 . and certain remarkable Produdts found under the Lava which iMiried Part of the Town 

 of Torre del Greco in 1794. By M. Tompfon. 0£lavc>. Naples, 1795. 

 The author has obferved filiceous ftalaftites in the mountain of Santa Flora in Tufcany, 

 in the Euganean mountains, in the ifle of Ifchia, and in the crater of the Solfatara or 

 Pozzuolo. In moft of thefe places there are likewife foda, humid and hot vapour, and 

 fulphur, either in fubftance or in the ftate of fulphuric acid. The folution of the filex 

 rnay therefore be attributed to the combined adion of thefe three chemical agents, particu- 

 larly the foda. A kind of liquor filicum is formed. The author has difcovered that the 

 arundo donax of the family of the bamboos contains fea-falt, and confequently foda ; and 

 it is known that the knots of tlic bamboo contain filiceous concretions. The celebrated 

 Black afcertained the prcfcncc of mineral alkali in the Geyfcr fpring in Iceland ; round 

 whicii filiceous incruftations are formed. — Edinburgh Tranfaftions, Vol. 2 and 3. 



By digging into the houfes of the town of Torre del Greco, which were buried under 



the lava in 1794, among other things were found: I. Glafs changed into Rciumur's 



$ porcelain. 



