i 882.] 
Analyses of Books, 
425 
totally distinCt class from the other two, and requires a different 
procedure in its use. The well-known red colour, once in such 
high request, commonly known as magenta, is called, in strictly 
scientific circles, rosaniline acetate, whilst among dealers and 
consumers it often receives such names as roseine, fuchsine, 
fuschine, fuchsiacine, azaleine, and rubine. “ Harmaline ” was 
originally and rightfully a red colour obtained from the seeds of 
the Syrian rue ( Peganon harmala), used to some extent as a dye 
in the East and in Russia. But when the coal-tar colours were 
first brought out some inventor or patentee appropriated the 
same name to an aniline violet of the same class as the original 
“ mauve ” of Perkin. Others adopted the same misleading 
principle, and gave to various colours derived from aniline 
names taken from those of flowers. On the other hand, the strictly 
scientific names given to the new colours, being for the most 
part drawn up by German authorities, and embodying theoretical 
views on the constitution of the compounds in question, are far 
too long for the use of ordinary mortals. A further source of 
confusion is, that certain dealers — not perhaps of the highest 
standing — buy colours from the manufacturer, mix them^f prac- 
ticable, give them a new name, and advertise them as novelties 
not to be procured elsewhere. 
This confusion is not merely a theoretical evil, but a very 
matter-of-faCt nuisance, and though Mr. Slater does not profess 
to have completely disentangled the web, he has done very much 
towards it. Henceforth if dyers buy lots of one and the same 
colour, because offered them under different names, it will be 
their own fault. 
The work contains very much information which may be called 
original, having never appeared in print prior to the former 
edition. This matter is generally distinguished by its accuracy 
and stridlly practical character. The subject of mordants was 
especially treated with a clearness and thoroughness which had 
never before been equalled, and not a few errors which had found 
their way into widely circulated books were corrected. Thus it 
might scarcely be believed that authors on tinCtorial subjects 
were ignorant of the palpable faCt that “ double muriate of tin ” 
is not a stannic but a stannous chloride. These features have 
all been retained in the present edition. The additions made are 
numerous and important, relating of course mainly to dyes and 
colours introduced into commerce during the last few years. 
Amongst these figure African red, alizarine blue, alneine, anthra- 
cene blue, anthracene orange, anthracene violet, aureosine, 
benzaurine, beth-a-barra wood, Biebrich scarlet, Blackey blue 
and orange, benzyl blue, Bordeaux, calliatura wood, campo- 
bello yellow, cannelle brown, cauline, chlorozone, chrome 
alum, chrysoline, coccine, coeruleine, cyanogen purple; the 
malachite, solid, and methyl greens ; enthylrosine pink, eosine 
and its modifications, galleine, the indophenols and indulines, 
VOL, IV. (THIRD SERIES). 2 F 
