BIBLIOGRAPHY OF ANALYTICAL CHEMISTRY OF MANGANESE 9 



1842: 2. Levol, A. Nouveau raoyen d'assai du manganese. 



J. de pharm. (3), i, a, 210; Chemist, 3, 149; PoL Centrbl., 1842, 



874; DingL pol. J., 85, 299; Ann. des Mines (4), 2, 205; J. prakt. 



Cheni., 26, 151; Chem. Gaz., i, 329; Ann. Chem. (Liebig), 44, 



355; Arch. Pharm., 81, 322. 

 Determination of peroxide by solution of the ore in hydrochloric acid 



and a ferrous salt, and titration for the excess of the latter with 



potassium chlorate, using indigo test paper. 



1842: 3. Otto, J. F. Unterscheidung des Zinks von Mangan in 

 Auflosungen welche Ammoniaksalze enthalten. 



Ann. Chem. (Liebig), 42, 347; Pharm. Centrbl., 1842, 684; Chem. 



Gaz., I, 180; Am. J. Sci. (i), 47, 194; Ann. des Mines (4), 3, 569; 



Berzelius' Jsb., 23, 242. 

 Separation by precipitation as sulphide and solution in acetic 



acid, 



1842 : 4. Otto, J. F. Neue Methoden den Chlorkalk und den Braun- 

 stein zu priifen. 



Dingl. pol. J., 85, 296; Pol. Centrbl., 1842, 876; Cheinist, 3, 346; J- 



de pharm., 1842, Mar. 

 Determination of peroxide by solution in hydrochloric acid and addi- 

 tion of ferrous sulphate, using potassium ferri-cyanide as an indi- 

 cator. 



1843: I. Baumann, H. Priifung des Braunsteins auf seinen Gehalt 

 an Superoxyd. 



Arch. Pharm., 84, 171; Chem. Gaz., i, 499. 



Solution of ore in hydrochloric acid and passage of chlorine into a 

 solution of silver nitrate. (It is not evident how this procedtxre 

 could possibly yield restilts of any value whatever.) 



1843: 2. Ebelmen. Note sur le dosage du manganese. 



Ann. chim. phys. (3), 8, 508; Ann. des Mines (4), 4, 409; Pharm. 



Centrbl., 1844, 400; Chem. Gaz., 1843, 685; Ann. Chem. (Liebig), 



48, 369; Arch. Pharm., 90, 178. 

 Determination as protoxide by reduction of the higher oxides b}- 



ignition in a current of hydrogen. 



1843: "3. Fresenius, F., and Will, H. Neue Verfahrungsweisen 

 zur Bestimmung des Werthes der Pottasclie und Soda, der 

 Sauren und des Braunsteins. 



Ann. Chem. (Liebig), 47, 87; 49, 137; Dingl. poL J., 90, 219; Pol. 

 Centrbl., 1843, b, 395; Chem. Gaz., 1844, 52; Pharm. Centrbl., 

 1843, 804; Berzehus' Jsb. (1845), 24, 261; Buchner's Rep., 83, 

 240. 

 Determination of peroxide by solution with oxalates and absorption 

 of the carbon dioxide. 



