Intelligence and Miscellaneous Articles. Hal 



orange-red coloured needles : it is soluble in aether, in alcohol and 

 in hot water, but dissolves with difficulty in a boiling solution of 

 alum. Sulphuric acid dissolves it, and becomes of im intense red 

 colour ; on diluting the solution with water the colouring matter is 

 precipitated unaltered. The salts formed with lizaric acid are of a 

 red or violet colour, and, with the exception of the alkaline salts, 

 are insoluble in water or in alcohol. The composition of the free 

 acid is expressed by the formula C^o H'^C. The salt of lead, ob- 

 tained by adding lizaric acid, dissolved in alcohol acidulated with 

 acetic acid to an alcoholic solution of acetate of lead, is formed of 

 C^ W 07, 2PbO. 



Oxylizaric Acid is distinguished from lizaric acid by the facility 

 with which it dissolves in a solution of alum. It is slightly soluble 

 in cold water, but dissolves more readily in boiling water, in alcohol, 

 iEther and the alkalies. Fuming sulphuric acid dissolves, and may be 

 heated with it without altering it ; the author gives C'^ H^ O^ as Us 

 composition ; the salt of lead would have C^^ H* O*, PbO for its 

 formula. Hence it is evident that by adding one equivalent of 

 oxygen to one equivalent of lizaric acid, two equivalents of oxyli- 

 zaric acid will be obtained. It is this relation between the two 

 acids which is expressed by the name of the latter. — Journ'.'de 

 Pharm. et de Chim., Janvier 1849. ^ : mo- 



ANALYSES OF FELSITE, OLIGOCLASE AND MUROMON^'i'l'I^E.' 



M. Kerndt has analysed the above-named minerals, with the an- 

 nexed results : — 



Felsite. — Crystallized green felsite, density 2'54^5,,;^9ni„j^9^ein- 

 mais gave, taking the mean of two analyses, — idoioa m QinAmx-J 



Silica 63-657 ' 



Alumina 17-271 



Potash .^„ . ^; Jta:§59., .:..,.,, ^ , , .., 



^Oda ■■,i .•»iu(«<;iD(fftfii«3#> >'cj f»o.fi»ri«f '^-i ' 



Lime '. .^ 0-394 



Magnesia 2-281 



Protoxide of iron 0'451 f^jj,^ i)9jB9rl 



Protoxide of manganese. . 0-153 niiuofoo o/^j 

 '03 no «100*00 fiotdw lo ano 



OUgoclase. — This mineral from Boden liear Marien'6erg,^iA*^pi'e 



Erzgebirge, of density 2-66-2-68, gave — fin-^.n? 



Silica 61-958 --^V^ '^f^ 



Alumina 22-658 . ^^'^ ^1,,^"'^ 



Potash 3-079 'T'''', 



Soda 9-432'''''»''^. ^«^"""""''« 



Lime ;;.; 202^'^"7'' 



Magnesia 0-104*''"'''^ ' 



Peroxide of iron 0-348 



.Biiimwifi olijii 



Peroxide of manganeVeV. 0-396-'"?''f "^^ ^'^S'^'" 

 -3 i\u\i\'ft .eJijifiqaa 



100-000- \)jrK VnosiA 



