1030. Acetylene Gas (Acetylene)
A. MS., n.p., n.d., pp. 1-16.
The role of acetylene as an illuminating gas. Its commercial value and its greatest disadvantages. Way of avoiding explosions. The history of the discovery of the gas. Refutation of the claims of Berthelot, especially his theory of thermo-chemistry. Acetylene's importance in breaking down the barrier between the organic and the inorganic.

1031. Acetylene
A. MS., n.p., n.d., pp. 1-l9 (long sheets), with several pages of inserts and variants.
The content of this paper is similar to that of MS. 1030, but more detailed.

1032. Acetylene Gas (Acetylene)
A. MS., n.p., n.d., pp. 1-6, with 2 loose first pages and a p. 47.
Early draft of MS., 1030.

1033. Digest of the Chemistry of Acetylene (Acetylene)
A. MS., n.p., n.d., pp. 1-7, 1-4 (continuous), 5-20, 28-43; 5-7; plus 6 pp. of variants and 1 p. of logic notes.
The history, properties, and formation of acetylene.

1034. [Notes on Acetylene]
A. MS., n.p., n.d., pp. 35-158 (p. 114 missing); plus one unnumbered sheet of calculations and one sheet dated "Astor Library 1898 Apr. 26."

1035. [Pending Claim]
TS., April 27, 1896, 1 p.
Application of CSP for a generator for acetylene and other gases. Serial No. 589239.

1036. Argon, Helium, and Helium's Partner
A. MS., n.p., [c.1890?], pp. 1-5.
On the discovery of new elements, spectrum analysis, and Mendelyeev's Periodic Law. Description of the total eclipse of 1869 in Kentucky, where CSP was sent as part of the Coast Survey Expedition. As an assistant to Professor Winlock of the Harvard College Observatory, CSP claims that he was the first to see argon.

1037. Argon, Helium, and the Partner of Helium. Continued
A. MS., n.p., [c.1890?], pp. 1-8. On argon.

1038. Chemistry
A. MS., n.p., n.d., pp. 1-5.
Definitions of "substance," "elementary substance," and "chemical compound." Valency and chemical graphs. Mendelyeev and the array of chemical elements.

1039. Chemistry The Elements
A. MS., n.p., n.d. (but a reference to Clarke 1897 on p. 1), 55 pp., including a sequence pp. 1-6 (chemistry); plus fragments and mathematical jottings.
Mendelyeev's array of the elements.

1040. Notes on table of atomic weights (Notes on At. Wts.)
A. MS., n.p., n.d., pp. 1-6; plus 3 pp. of variants and 24 sheets of calculations.
Dates appear on four of the loose sheets, one of which is headed "Table of Atomic Weights compiled from very insufficient data in 1905." Another sheet reads: "Atomic Weights compiled without recent data 1908." CSP regards the table of atomic weights as one of the two most extraordinary achievements of inductive logic (Kepler's achievement is the other).

1041. Valency (Ve)
A. MS., n.p., [1905], pp. 1-26, with 6 pp. of variants.
CSP sets out to discuss "the mode of composition of ideas," developing an analogy between simple ideas and chemical elements.

1042. Valency (V) (V . . .)
A. MS., n.p., n.d., pp. 1-8, 1-12, 5-14; plus 10 pp. of variants.
Earlier draft of MS. 1041.

1043. Note . . . to be printed in small type at the end of the article
A. MS., n.p., n.d., pp. 1-5.
The article referred to here is the article on valency (MSS. 1041 and 1042, if completed). CSP favors the strict law of valency, but admits that there are some problems in connection with its application.

1044. A Proposal of a change in the Atomic Weights with a remark on the Periodicity of the Properties of the Elements
A. MS., n.p., n.d., 8 pp.
CSP proposes that the present atomic weights be multiplied by 4, and that every element whose place is set in Mendelyeev's scheme receive an ordinary number. This two-part proposal, CSP suggests, has pedagogical and mnemonic advantages.

1045. The Seventy Decanes
A. MS., n.p., n.d., 5 folded sheets (9 pp.).

1046. Chemical Curves
A. MS., notebook, n.p., n.d.
Curves of the expansion of water, of the density of mixtures of sulphuric acid and water, etc.

1047. Views of Chemistry: sketched for Young Ladies
A. MS., seven small notebooks, n.p., [c.1861].
The topics covered in the seven notebooks are as follows: kinds of matter, chemical method, qualitative analysis, salts, equivalence of force, states of aggregation, tables illustrating the equations of chemical force.

1048. [Fragments]
A. MS., n.p., n.d., 83 pp.; plus a small notebook filled with calculations pertaining to chemistry.
Among the fragments are curves of the density of the mixture of alcohol and water and of the mixture of sulphuric acid and water. Also, calculation of the axis of the upper part of the curve of residuals of atomic weights and various syntheses.