| RefNo | PP/19/6/1 |
| Previous numbers | PP/51-53/6 |
| Level | Item |
| Title | Manuscript, 'An improved apparatus for ascertaining the sensitiveness of safety-lamps when used for gas-testing' by Frank Clowes |
| Creator | Clowes; Frank (d 1923); British chemist |
| Date | 1892 |
| Description | Clowes writes: 'An apparatus devised for the purpose of testing the sensitiveness of different forms of miners’ safety-lamps, when they are employed for detecting and measuring low percentages of firedamp, has been already described in the ‘ Roy. Soc. Proc.’ (vol. 50, 1891, p. 122) [see PP/18/7]. The section of the apparatus shows that the apparatus consists of a large cubical wooden box or chamber, into the upper part of which the requisite measured volume of methane or firedamp can be introduced, the complete admixture of this gas with the air of the chamber being then secured by swinging up and down a broad wooden flap, the area of which is nearly equal to the square section of the chamber.'
Annotations in pencil and ink. Includes one diagram of a section of the apparatus.
Subject: Scientific apparatus and instruments
Received 24 March 1892. Read 31 March 1892. Communicated by Henry Edward Armstrong.
A version of this paper was published in volume 51 of the Proceedings of the Royal Society as 'An improved apparatus for ascertaining the sensitiveness of safety-lamps when used for gas-testing'. |
| Extent | 3p |
| Format | Manuscript |
| PhysicalDescription | Ink and graphite pencil on paper |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
| RelatedMaterial | DOI: 10.1098/rspl.1892.0011 |
| RelatedRecord | PP/18/7 |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8105 | Armstrong; Henry Edward (1848 - 1937); chemist and educationalist | 1848 - 1937 |