Accounts of New Publkathns: n-r 



iblutely the relief or profile. To thefe two cafes he adds certain rules for tracing for- 

 tifications, deduced fingly from confiderations relative to their defilement. 



Thefe three queftions are preceded by fome preliminary notions ; and by the method 

 in which Say has treated his fubjedl, we have acquired in this memoir a more com- 

 plete treatife than any which has yet appeared on defilements. He has the merit of 

 having fixed with clearnefs and precifion, a feries of principles which hitherto have been 

 only tranfmitted in a fugitive and as it were traditional manner, in the School de Me- 

 zieres, appropriated to the inflruiStion of the. eleves du ghiie, and deftined again to receive 

 them, according to the mefTage long ago fent from the Government to the Legidative Body. 



The fix memoirs of chemiftry are: i. Defcription and ufe of an eudiometer of fulphate 

 of pot-afh (liver of fulphur), by Guyton. 2 Obfervations on the eudiometric properties 

 of phofphorus, by BerthoUet. 3. Analyfis of the calcedony of Creufot, by Guyton. 

 4. Experiments on the fufibility of earths, and tlieir habitudes with faline fluxes, together 

 with the folvent aftioii they exert on each other, by Guyton. 5. Experiments on the 

 formation of the colouring prudlc principle, by Bonjour. 6. Ihe properties of the ful- 

 phureous acid, and its combination with earths and alkaline bafes, by Fourcroy and' 

 Vauquelin. 



[To he coiitiniied.\ 



NEW PUBLICATIONS. 



Travels in Hungary, with a fliort Account of Vienna in the Year 1793. By Robert 

 Townfon, LL. D. F. R. S. Edin. &c. &c. Illuflrated with a map and fixteen other cop- 

 per-plates. 4to. i;o6 pages including the Index. Printed for Robinfon. Price il. is. 



To thofe who attend chiefly to diplomatical politics, or the balance of power, the king- 

 dom of Hungary will probably afford an objeft of. fubordinate value ; but on the larger, 

 more extended and important confiderations of interual government, political economj', 

 and the (late of man with regard to fcience and manners in the progrefs of civilization, it 

 will prove highly interefting. Mr. Townfon has publiflied the prefent work from the cor- 

 re£led notes of a five-months' tour ; in which thefe and other objects of utility and enter- 

 tainment have engaged his attention. As I hope fliortly to give a fuller account of this 

 work, the prefent notice is intended only to announce the publication of a valuable and en- 

 tertaining book. 



The Hiflolre Naturelle of Valmont de Bomare, rangce par ordre de matieres par 

 L. Blondelin of the Univerfity of Bale, ornamented with coloured plates engraved by 

 J. J. de Mechel, was announced for publication in the middle of February lad, in 

 the Decade Philofophique, &c. It will be printed at Bale; and the Quadrupeds were 

 then ready for the prefs. It will amount to about ; 50 (lieets, or 6 or 7 volumes in oclavo, 

 with at leaft the fame number of plates. One number, containing feven iheets and eight 

 plates, will appear every fccond decade, or one volume of three numbersevery two months. 

 The price four livrcs per number, with the figures plain ; or fix, if coloured. The fub- 

 fcribcrs to the firft jco copies will have the advantage of a deduiflion of one-fourth. The 

 plates may be had at the price of two livres, plain ; or fix, coloured. 



.Subftribcrs pay in advance for one number or volume ; and the reft, on delivery, to Cit. 

 2 Fuchs, , 



