ae ere 
Dy PALS eee ss et z 
Migcellaneous Bibliography. 139 
oxygen atom on the same line, and one with the single oxygen atom in- 
e 
termediate; in ethylic ether, 4 O - the carbon atoms are linked by 
H 
e 
the oxygen atom, while the other three bonds of each are united respec- 
tively with one atom of Me and two of H. To farther elucidate this im- 
portant fact of combination, Dr. F. makes use of the graphic notation of 
Crum Brown (using in lectures the glyptic formule of Hofmann).* 
Aluminic oxyd is em (pol Oe and ethylic ether is 
1: Aa i Fs ieee] 
n—t-¢_o—b_4_a, 
H 
hh uy 
in which the mode of union of the atoms is the same as that above 
given. These graphic methods, used more or less by Kekulé, Wurtz, Ros- 
coe, Foster, ete., are most happy in the clearness with which they express 
the manner in which the bonds of an atom are saturated. Thus Dr. F, 
SON 
decomposition, are most clearly described. And thus the object of the 
work, to furnish names, formule and reactions, and so to save to the 
student the time spent in copying these in the lecture room is most suc- 
cessfully accomplished.t G. F. B. 
- Chemical Tables ; by Srzpuen P, Suarpres, §.B. Cambrid 
Sever & Francis, 1866. . 192.—We cannot give a better idea of th 
value of this book than by stating the heads under which the tables 
are arranged. Tables for the calculation of analyses; relating to specific 
gravity; relating to heat; for gas analysis; relating to light; miscella- 
neous tables. table of logarithms closes the volume. A collection 
was prepared. 
* Not. Roy. Inst. of Great Britain, April 7, 1865. 
+ Quart. Jour. Chem. Soc., xiii, 177, and [2], iv, 372. 
Cogs 
