286 Miscellaneous Bibliography. 
tena and full index. The structure and classification of insects 
re fully discussed, as far as the families and the prominent genera 
and species in eac ch family are oe cribed. se in aed beg full 
genera in some of the orders. It embraces the Arachnida and 
yriapoda as well as the pees insects, which is quite unusual 
in treatises on entomolo : 
of Eeistence: Part I. Devoted to the enunciation 
of the laws which determine the motions that result from the 
collision of ponderable bodies; by Ex1as Dexter. 156 ie 8v0, 
with 5 plates. 1869. Ne w York. (Edward Dexter, 564 Ses! 
ich 
Newton’s Laws of Motion , the author finds it easy to show hed 
reference to the earlier part of his own book, that the views of 
efforts by the “advance men” of the times. 
4. A Practical Treatise on Metallurgy adapted or the last 
London edition of Professor Kerl’s Metallurg gy. Vol. iii; Steel, 
Fuel, Supplement ; eat with 145 wood engravings by 
Wiri1am Croox : RNST elias * 820 
pp. 8vo. New Yo rk, 1870. * (obi Wiley & Son. )—This volume 
is a most valuable addition to our previous literature upon the im- 
portant subjects of which it treats, and it is not too much to say 
a comprehensive s Ray progress in this department 
of kno e. n t of the materials is excellent an 
the subjects are discussed with all desirable fulness ; thus the Bess- 
emer steel process covers ges; while proper r notice is taken 
0 pa 
of all other methods, even 6 the Ellershausen process, Bessemer’ $ 
new system of high pressure, hot blast furnaces, and Siemen’s 
process of producing steel direct from the ores, The table of Or 
ents covers 21 pages, and exhibits clearly the great range © 
interesting topics which a the volume. Full references to origi- 
nal in all languages bearing on steel and fuel add value 
ta the work, This is altogether the most important SaLputibe 
of the three volumes, of which it is the last as well as best. 
5. Lithology of the Seas of the Old World ; by M. DELESSE.— 
elesse we have seen ne the chart. In the 
physical geograph y. The map is an pases 
2 of engraving and coloring. 
coe 
ah. 
