Paper, 'Comparative effects of different parts of the spectrum on silver salts' by [William De Wiveleslie] Abney

Description

Abney writes: 'In 1881 I communicated to the Royal Society (“Proc. Roy. Soc.,” vol. 33) [see PP/1/13] the results of a research I had made on the comparative effects of different parts of the spectrum on the haloïd salts of silver, and I pointed out that a mixture of iodide and chloride, and iodide and bromide of silver gave rise to a very curious photographic spectrum, a minimum of action taking place at G, the point where the iodide is mostly affected, two maxima consequently occurring. I also gave some theoretical reasons why this should be. About a year afterwards Herr Schumann, of Leipzic, called in question this result, as applied to bromo-iodide of silver, when the two salts were formed simultaneously, i. e., when mixtures in water of soluble bromides and iodides were precipitated together by silver nitrate.'

Annotations in pencil and ink.

Subject: Chemistry

Received 2 March 1886. Read 18 March 1886.

A version of this paper was published in volume 40 of the Proceedings of the Royal Society as 'Comparative effects of different parts of the spectrum on silver salts'.

Reference number

PP/8/16

Earliest possible date

1886

Physical description

Ink and graphite pencil on paper

Page extent

6 pages

Format

Manuscript