Miscellanies. _ 391 
Crystallography. The means of calculation employed by that distin- 
guished author, are those furnished by Geometrical Analysis, of which 
he says, “it is and must be the simplest and most natural of all meth- 
ods.” The practical value of these calculations, appears from the fol- 
lowing remarks of the author :— the determination of a single angle 
in a dimetric or tetraxonal solid, is, in some instances, sufficient for 
ascertaining every angle, interfacial or plane, that the solid contains, 
and often in the monometric solids not even this datum is required.” 
Appendix B, is occupied with a discussion of the chemical classi- 
fication of minerals, and a tabular view of the same. 
The work is concluded by a Mineralogical Bibliography, of seven- 
teen pages, containing Ist, a catalogue of all the ancient works on 
this science, with a selection of the most important ones of modern 
times, and 2d, a catalogue of all American publications on mineral- 
ogy, both original and reprinted, and likewise a list of all the articles 
on this topic, scattered through the American periodicals. Cata- 
logues of this nature have always been held valuable. They fur- 
nish information which few have the opportunities of collecting, and 
are of the utmost importance to those who make original investiga~ 
tions. We here see how little this nation has, until recently, done 
for the advancement of a science, a knowledge of which is so im- 
portant to the full development of the resources of the country. 
This cause of reproach is now however fast disappearing. The in- 
stitution of geological and mineralogical surveys in most of the states, 
does great honor to our legislators, and must contribute much to 
extend the boundaries of science. Many minerals now unknown, 
are doubtless reserved to reward the search of future explorers. 
Within a short space of time and a limited extent of territory, three 
new species (viz. Microlite, Edwardsite, and Eremite) have been 
added to the domain of Mineralogy, by one of the most zealous and 
accomplished cultivators of this science among us. We trust that 
many in other parts of the land will imitate his zeal and be alike suc- 
cessful. 
The mechanical execution of the book merits commendation. 
The figures both on wood and copper are made with much neatness 
and accuracy, and the printers have evidently spared no pains in 
Contributing their part towards the execution of a text book, superior 
0 typographical excellence to any of its American predecessors. 
The industry, research and scientific attainments evinced in the 
©xecution of this work, afford satisfactory evidence of the ability of 
