244 
THE GEOLOGIST. 
hour, must, for the present, be passed over with a few brief re- 
remarks on their respective Jplans. The former is an exceedingly 
elaborate manual, not of simple mineralogy, but including the 
examination of minerals before the blow-pipe, as the means of 
identifying their respective qualities ; in other words, to establish 
a simple method by which the nature of any mineral substance 
may be determined. A new " classification^^ is appended, but 
as this requires a more minute consideration, it must be passed 
over for the time. The work is a very creditable performance. 
The aim of the second work is not so high — it is designed as a 
cheap and concise manual of chemical mineralogy and also intro- 
duces a new system of classification — we should say entirely new, 
as it is dissimilar from any yet published, whilst the former work 
is based upon similar systems already in use, to a certain extent 
— the two works, then, are entirely dissimilar — the former is in 
the rank of " high science,^^ whilst the second, from its style and 
cheapness, may be classed with popular science.^' 
