440 Miscellaneous Bibliography. 
and elastic. But aimee still goes on, though very slowly, and 
et fatty acids disappear. Finally the linox xyn itself undergoes de- 
comes unserviceable in binding colors or in protecting 
the painted surface. 
The albuminous or mucilaginous matter which has so long fig- 
ured in the books to account for slowness in the drying of unboiled 
oil, Mulder has searched for carefully but in vain; and he finds 
that fresh oil treated by any method which should ‘simply tar 
umen or mucilage, still dries no better than before. And, after 
all, this inappreciable substance, if it were — would fail to 
explain what it was ented to account for: ince there is no 
own reason why a sites that helps some oo ar to become 
rancid, should hinder others from oxydizing to become dry. It is 
therefore high time for science to consign this Sohal to the limbo 
of “ig ote follies 
oxyds and ‘acetates of lead act as driers, not by precipitating 
Mateos matters, but by forming a little lineolate of lead, which 
oxydizes readily and communicates its activity to the oil itself, 
The addition of some manganese salts, such as the borate, accel- 
erates the drying, because the loosely held eraee' of manganese - 
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it m may dry qui icky can never che so set as oil boiled with suitable 
additions; because in boiling some linoleic anhydrid is formed, 
ich being more adhesive and elastic than linoxyn, adds muc uch to 
oad Baa we 
at — h tothe problem which gave 
the i inveatigntio pasion, ej wl paints a unsuitable to prevent te nt the 
rusting of iron, ‘and Connbdes that coal tar contains the best ma 
terials for a protectin g coat. 
The book contains a great deal that is new, and the author has 
been, to treo oe “ Getren dem Grundsatze, welcher 
0 
he does not 
Ueki hte nicht as vegan.” Of ¢ course he does 
exhaust his subject, but science is greatly — pats 
it constitutes a masterly contribution to the _o 
