54-4' liifelligence and Miscellaneous Articles. 



These numbers indicate the following formula : — 



C" 3000 56-87 



H^2 325 6-15 



N-* 350 6-60 



0'« 1600 30-38 



5275 100-00 



Salt of Lead. 

 C40 H^8 N^ 0'6. . 5250 66-88 



Pb* 2600 33-12 



7850 100-00 



As the salt of lead deflagrates slightly when heated, and as the 

 nitromarates are yellow, the nitrogen must be in the state of hypo- 

 nitric acid NO- = X. Nitromaric acid then becomes C*' H'''^ X^ O*, 

 derived from C*' H^'S O^, 



Comparing it with pimaric acid. . C^" H"" O^ monobasic, 

 we have Marie acid . . C^» H*^ O' + O'' bibasic. 



Nitromaric acid C" H""^ X' 0- + 0« bibasic. 

 It appears that under the influence of nitric acid, pimaric acid first 

 exchanges H^ for 0-, then absorbs two more atoms of oxygen, be- 

 coming bibasic marie acid (hypothetical). The latter afterwards ex- 

 changes H^ for its equivalent X'', and is converted into nitromaric 

 acid. The preceding formulae, unfolded, become 



Pinic, sylvic and pimaric acid. . C'-" H^^-l-O'-. 



Salts C20 H'^3 M + 02. 



Nitromaric acid C^o H-" X^ O + O^. 



Salts C'i" H'^^ M' X2 + 0'. 



Annates de Ch. et de Phys., Avril .1848. 



ACTION OF ZINC ON SELENIOUS ACID. 

 M. Wcehler remarks, that zinc does not act with selenious acid as 

 it does with sulphurous ; some selenium is reduced, and there is 

 obtained an acidulous selenite of zinc. The solution of this salt, 

 when evaporated in vacuo, yields large yellow crystals, which are 

 modified rhombic prisms. It yielded by analysis,. — 



Selenious acid 7603 



Oxide of zinc 1486 



Water 9-10 



99-99 

 This salt is unalterable by the air, very soluble in water, and has 

 a strong acid reaction : when heated the solution becomes turbid, 

 selenious acid is disengaged, and a colourless neutral powder of sele- 

 nite of zinc is deposited, which by long boiling redissolves. — Journ. 

 de Ph. et de Ch., Mars 1848. 



LIEBENERITE — A NEW MINERAL. 



This name has been given to a mineral of a greenish-gray colour, 

 crystalhzed in hexahedral prisms, and found disseminated in a red 

 felspar porphyry at Monte Viesena, near Forno, in the valley of 

 Flems (Valle de Fassa). 



M. Marignac has sul)mitted this mineral to analysis, and has de- 



