&2 New Publications. 



ft Nitric and Nitrous Acids — Acidum Nitrofum, Pbarm. Laid, 

 Aquafortis . 



" The nitric acid fhould he perfectly colourlefs and as 

 limpid as water. It fhould be .preferred in a dark place, to 

 prevent its convcrfion into the mtrot/s kind. 



iC Thefe acids are molt likely to be adulterated with ful- 

 phuric and muriatic acids. The fulphuric acid may be dif- 

 covered by adding to a portion of the acid, largely diluted, 

 nitrated or nmriated baryles, which occafion, with fulphuric 

 acid, a white and infoluble precipitate. The muriatic acid 

 may be afcertained by nitrate of fdver, which affords a fedi- 

 nient at fir ft white, but which becomes coloured by expofure 

 to the direeilight of the fun. Both thefe acids, however, 

 may be prefent at once; and, in this cafe, it will be necef- 

 fary to add a folution of nitrate of barytes as long as any pre- 

 cipitate falls, which will feparate the fulphuric acid. Let 

 the fediment fubfide ; decant the clear liquor, and add the 

 nitrate of filver. If a precipitate appear, muriatic acid may 

 be inferred to be prefent alfo. 

 . " Thefe acids mould have the fpecirlc gravity of 1550. 



i: Muriatic Acid — Acidum Muriaticum, P. L. Spirit of Salt, 



ic This acid generally contains iron, which may be known 

 by its yellow colour, the pure acid being perfectly colourlefs. 

 It may alfo -be detected by the fame mode as was recom- 

 mended in examining fulphuric acid. 



" Sulphuric acid is difeoverable by a precipitation on add- 

 ing the muriate of Barytes. 



(i The fpecific gravity of this acid fhould be 1170." 



IV. Anjilytibal Effhys towards promoting the Chemical Know <- 

 ledge of Mineral Snbjlances. By Martin Henry Klaproth, 



Profejjcr of Cbcmijlry, Afjeffor to the Royal College of Phy- 



JiciatiS) Member of the Royal Academy of Sciences at Berlin, 



and various other learned Societies. Tranjlated from the 



German. I Vol. 8vo. p. 592. London ; Cad 'ell and Davies. 



THE merits of Klaproth as an analyfer are too well known 

 to require, commendation. The learned tranflator, Doctor 

 Gniber, could not have rendered a more acceptable fervice 

 to Englifh chernifts than by giving them the prefent tranfla- 

 tion, which is faithful and accurate. We fubjoin a fhort 

 extract from the work. 



Chemical 



