152 Bibliography. 
contain gener: 
anids being C12 Fe2 Ma Ne, and the ferricyanids, containing iron in 
two-thirds its ordinary equivalent, C12 Fes M3 Ne. These two salts 
are respectively quadri- and tribasic, but in the nitroprussids the first 
form has lost H2 becoming bibasic, and the new type will be C12 Fez 
2 Ne; while in the salts of Playfair, O2 has replaced Cz, or N Oz, 
is substituted for N C2, and the formula becomes (C10 Oz) Fea M2 Ne; 
a constitution which, in another form, Gerhardt has shown to corres- 
pond perfectly with the analytical results obtained by Playfair. 
A similar view is extended to the nitric species of the hydrocarbons, 
and nitrobenzene, C12 Hs N Os, is compared with bitter-almond oil, 
Cis He Oz, by writing its formula (C12 Oz) (Hs N) O2. This novel 
suggestion seems deserving of farther attention. j 
In treating of the oxydating power of a solution of a ferricyanid 
with hydrate of potash, it is suggested that peroxyd of hydrogen is the 
oxydating agent, as the assimilation of 2K from 2K H Oz will give 
ally six equivalents of hydrogen or a metal ; the ferrocy- 
6 
May following, are here reproduced ; and the newly discovered vola- 
tile base piperidine C1o H1i1 N, is noticed as homologous with arsine 
and stibethine. These alkaloids are to the ammonias, what aldehyd is 
to alcohol, differing by Hz. Strecker’s fine researches on the bile are 
embodied, and the close association of the sulphur-acid with the other 
species, serves the author to illustrate his idea of the protein bodies, 
which he regards as mixtures of a species containing sulphur, with 
normal species having the composition of an amid, or rather nitryl of 
cellulose, and represented by C24 Hiz Ns Os; so that it may produ 
C24 H2o0 O20 and 3N Hs by taking up 6H2 Oz. The different forms 
of protein are compared to the isomeric bodies, cellulose, starch, and 
dextrin. 
Gelatin is regarded as a similar derivative of glucose, with four 
equivalents of ammonia, and to be C24 H2o Na Os, capable of reget 
erating grape sugar and ammonia by taking up 8H2 O2. These form- 
ulas, supported by a comparison with many analyses, and by the peeu- 
liar reactions of gelatin and protein, have already been published “ 
this Journal,* and noticed with high commendation, by the editors 0 
the reer” Rendus des Travaux de Chimie, Messrs. Laurent 4? 
t 
we recommend its perusal to all chemical students. jf 
2. AM nm the Equinoctial Storms of March-April, 1850: 
an Inquiry into the extent to which the Rotatory Theory may be applied : 
F. P. B. Martin, Esq., (Atheneum, No. 1294.)—From the notices 
which have from time to time appeared in the pages of the At 
* See this Journal for Jan, 1848, p. 74—Sept,, 1848, p. 259, and Jan., 1849, p. 10% 
+ Comptes Rendus des Tray. for 1850, p. 317. pou 
