Paper, 'On the occurrence of silver in volcanic ash from the eruption of Cotopaxi [Ecuador] of July 22nd and 23rd, 1885' by John William Mallet

Description

Mallet writes: 'A few months ago I received from Senor Julian R Santos, of Ecuador, formerly a pupil of mine in the laboratory of this University, a specimen of volcanic ash collected at his place of residence, Bahia de Caraguez, on the coast of the Pacific, about 120 miles nearly due west from Cotopaxi.' He presents a chemical analysis of the sample. He states that 'The discovery of silver in the ash in question adds for the first time this metal to the list of elementary substances observed in the materials ejected from volcanoes, and the addition derives some special interest from the fact of the ash having come from the greatest of the volcanic vents of the great argentiferous chain of the Andes.'

Annotations in pencil and ink.

Subject: Chemistry

Received 26 November 1886. Read 6 January 1887.

A version of this paper was published in volume 42 of the Proceedings of the Royal Society as 'On the occurrence of silver in volcanic ash from the eruption of Cotopaxi of July 22nd and 23rd, 1885'.

Reference number

PP/10/1

Earliest possible date

13 November 1886

Physical description

Ink and graphite pencil on paper

Page extent

5 pages

Format

Manuscript