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870 [Doc. 310.
SWEDENBORG’S WRITINGS.
The author was engaged on this metallurgical work in 1724, as
appears from the following extract from Document 100: "About each
of the following metals, viz., gold, silver, and iron, I shall probably have
more to say than about copper;" and in Document 102, which was
written on May 26, 1724, we read: "By brother Anton Swab I
send you my collections on sulphur [Codex 82], vitriol [Codex 85],
alum, common salt [Codex 83], saltpetre, and the acids ; but these
collections are not yet set up with care, and as I desire to keep
them for myself alone, I should like to have them returned with
my former collections abou copper, not later than July."
Codex 82, which is entitled De Sulphure et Pyrite (On sulphur
and pyrites), fills 329 pages, 4to. It consists of 24 chapters, which
contain partly extracts from the works of Agricola and Rössler, and
partly the results of Swedenborg’s own observations and experiments.
Codex 83 is entitled De Sale Communi, h. e. de sale fossili vel
gemmeo, marino, et fontano (The common salt, i. e.rock-salt, sea-salt,
and salt obtained from saline springs); it contains 343 pages, 4to.
It consists of 43 chapters wherein are minutely described the various
processes by which salt is obtained in the different countries of
Europe. Chapter XLVII, which fills 50 pages, contains the observations
and results of the various authors, and especially of Agricola, in
respect to the chemistry of common salt."
Codex 84 is entitled De Secretione Argenti et Cupri, quæ " Seger
Arbete" vocatur (The secretion of silver and copper, which is called
"refining"), and contains 363 pages, 4to. As pages 295 to 363 are
crossed out, it appears that their contents were introduced by the
author into his work, published in 1734, entitled Opera Philosophica
et Mineralia, Vols. II and III of which treat of the metallurgy of
iron and copper.
Codex 85 is entitled De Vitriolo, deque modis vitriolum elixandi, &c.
(Concerning vitriol, and the modes of extracting it, &c.). It consists
of 446 pages, 4to.
"Codex 86.-Geometrica et Algebraica."
This Codex consists of 403 pages, quarto, part of which, however, is
blank. It treats of the following subjects :
I. A treatise on Algebra, pp. 3 to 22.
II. The principles of the Differential Calculus, pp. 24 to 47.
III. Examples of the Integral Calculus, pp. 49 to 52.
IV. A treatise on Analytical Geometry, pp. 61 to 145. This
treatise is almost entirely crossed out.
V. Rules in Mechanics, pp. 146 to 157.
VI. Geometrical and algebraical rules in Physics, pp. 158 to 164.
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