Reference numberPP/10/1
Previous numbersPP/42/1
TitlePaper, 'On the occurrence of silver in volcanic ash from the eruption of Cotopaxi [Ecuador] of July 22nd and 23rd, 1885' by John William Mallet
Date13 November 1886
DescriptionMallet 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'.
Physical descriptionInk and graphite pencil on paper
Digital imagesView item on Science in the Making
Access statusOpen
Related materialDOI: 10.1098/rspl.1887.0001
Related records in the cataloguePP/15/20
Fellows associated with this archive
NA6467Mallet; John William (1832 - 1912)1832 - 1912
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