quantity as to exhibit no metallic lustre,
the neck of the bulb may be cut off with a file immediately above the
sublimate, and the latter exposed to the flame of the blowpipe, when
the arsenic is volatilized, and may be recognized by its garlic odor.

[4] Quoted by Scheerer.

If the presence of cadmium is suspected in zinc-blende, it may be
detected by fusing a small piece of the blende upon charcoal in
carbonate of soda. The peculiar bright yellow sublimate of the oxide
of cadmium, if it be present, will not fail to indicate it. This
incrustation can be easily distinguished from that of zinc. Thus, with
the three illustrations we have given, the student will readily
comprehend the great utility of the blowpipe in the examination of
minerals.

Although the following tables were not arranged especially for the
last part of this work, still this arrangement is so good that by
their consultation the student will readily comprehend at a glance
what requires some detail to explain, and we feel no hesitation in
saying that, although they are not very copious, they will not fail to
impart a vast amount of information, if consulted with any degree of
carefulness.

The minerals given are such as are best known to English and American
mineralogists under the names specified. For more detailed reactions
than could be crowded into a table, the student will have to consult
the particular substance as treated in Part Third. If this part is
perused carefully previous to consulting the tables, these will be
found eminently serviceable as a refresher of the memory, and may thus
save much time and trouble.

And, finally, we would certainly recommend the student, after he shall
have gone through our little volume (if he is ambitious of making
himself a thorough blowpipe analyst), to then take up the larger works
of Berzelius and Plattner, for our treatise pretends to nothing more
than a humble introduction to these more copious and scientific works.

* * * * *

Mineral. Diamond

Formula. C

Behavior

in glass-bulb. --

on platinum foil. In fine powder is slowly consumed without
residue in a strong oxidizing Flame.

* * * * *

Mineral. Graphite

Formula. C with some iron silica, etc.

Behavior

in glass-bulb. Generally gives off water.