424 
Analyses of Books. [July, 
mineral localities are shown by special markings. Archaeology 
has also not been neglected ; the sites of old Picftish towers, of 
castles now destroyed, the localities of battles, &c., are given. 
The map is pasted on stout cloth, and folds up in a cover of 
convenient size. It will be an excellent companion for the scien- 
tific traveller in the North of Scotland. 
The Manual of Colours and Dye-Wares ; their Properties , Appli- 
cations , Valuation , Impurities , and Sophistications. For 
the Use of Dyers, Printers, Drysalters, Brokers, &c. 
Second Edition, revised and greatly enlarged. By J. W. 
Slater. London : Crosby Lockwood, and Co. 
The drugs and chemicals now employed in the tinctorial arts 
have become almost as numerous as those used by medical prac- 
titioners. Hence, just as the latter require special treatises on 
pharmacography and materia medica, so the dyer, the colour- 
mixer, &c., need the work before us. On the appearance of the 
first edition, indeed, a pharmaceutical contemporary designated 
it as a work on “ Materia tinctorial These two words mark out 
very clearly the position and the scope of the present book. It 
is no general manual of dyeing or tissue printing. It does not 
give instructions for the production of this, that, or the other 
colour upon any given class of materials. Nor, on the other 
hand, does it explain the manufacture of alizarine or eosine, of 
red liquor or tin-crystals. It takes up in alphabetical order the 
several colours, mordants, and other requisites ; describes their 
sources, properties, and uses, the appearance which they should 
present, the impurities — accidental or intentional — which they 
may contain, and the simplest means by which such imperfec- 
tions may be detected. There are also instructions for ascer- 
taining the colours with which any given sample of yarn or cloth 
may have been dyed or printed. An attempt has been also made 
to furnish a synonymy of the aniline and other artificial colours, 
a subject upon which there prevails no little confusion. As the 
author says, in the tone of one who has himself suffered from 
the want of system now prevailing, “ One and the same sub- 
stance is sold under different names, and, in return, bodies 
chemically and practically distinct are confounded under the 
same name. Not merely inventors and manufacturers give 
names to new products, but even retail dealers assume the same 
privilege. Thus we have to deal with a most perplexing chaos.” 
In illustration we find, on examining the work, that there are no 
ewer than three “ xylidine reds,” one of which belongs to a 
