nknown, the alphabetical table is
omitted, as unnecessary.--E.

[49] These combinations, which were all unknown to the ancients, are
called Camphorats. The table is omitted, as being only in alphabetical
order.--E.

[50] These combinations, which are called Gallats, were all unknown to
the ancients; and the order of their affinity is not hitherto
established.--A.

[51] These combinations are called Lactats; they were all unknown to the
ancient chemists, and their affinities have not yet been
ascertained.--A.

[52] These combinations named Bombats were unknown to the ancient
chemists; and the affinities of the salifiable bases with the bombic
acid are hitherto undetermined.--A.

[53] All the combinations of this acid, should it finally turn out to be
one, were unknown to the ancient chemists, and its affinities with the
salifiable bases have not been hitherto determined.--A.

PART III.

Description of the Instruments and Operations of Chemistry.

INTRODUCTION.

In the two former parts of this work I designedly avoided being
particular in describing the manual operations of chemistry, because I
had found from experience, that, in a work appropriated to reasoning,
minute descriptions of processes and of plates interrupt the chain of
ideas, and render the attention necessary both difficult and tedious to
the reader. On the other hand, if I had confined myself to the summary
descriptions hitherto given, beginners could have only acquired very
vague conceptions of practical chemistry from my work, and must have
wanted both confidence and interest in operations they could neither
repeat nor thoroughly comprehend. This want could not have been
supplied from books; for, besides that there are not any which describe
the modern instruments and experiments sufficiently at large, any work
that could have been consulted would have presented these things under a
very different order of arrangement, and in a different chemical
language, which must greatly tend to injure the main object of my
performance.

Influenced by these motives, I determined to reserve, for a third part
of my work, a summary description of all the instruments and
manipulations relative to elementary chemistry. I considered it as
better placed at the end, rather than at the beginning of the book,
because I must have been obliged to suppose the reader acquainted with
circumstances which a beginner cannot know, and must therefore have read