Spark discharge figure
Date
1892
Object type
Archive reference number
Material
Dimensions
height (drawing): 94mm
width (drawing): 108mm
width (drawing): 108mm
Subject
Description
Diagram created by sparking from Lord Armstrong’s machine for producing high tension electricity. These patterns were made in a powder of magnesium oxide (‘calcined magnesia’) and carbon black. The images were then photographed and drawings produced from them.
The author states in his paper that: ‘No.6 was produced by a succession of discharges from four ½-gallon Leyden jars joined up in pairs, two in parallel and two in series. It will be observed that the circular lines are much more strongly developed than in the preceding figures, but that the radiations from the wire are less so’.
Illustration from the manuscript version of the paper ‘On a multiple induction machine for producing high tension electricity, and on some remarkable results obtained with it’, by Lord Armstrong, Proceedings of the Royal Society, vol.52 (1892), pp.176-191. Printed as figure 6 plate 5 in the published paper.
The image is inscribed below in ink: ‘No.VI’ and in pencil ‘2/3’. Imprint details verso.
William George Armstrong, Baron Armstrong (1810-1900) armaments manufacturer and industrialist was elected a Fellow of the Royal Society in 1846.
The author states in his paper that: ‘No.6 was produced by a succession of discharges from four ½-gallon Leyden jars joined up in pairs, two in parallel and two in series. It will be observed that the circular lines are much more strongly developed than in the preceding figures, but that the radiations from the wire are less so’.
Illustration from the manuscript version of the paper ‘On a multiple induction machine for producing high tension electricity, and on some remarkable results obtained with it’, by Lord Armstrong, Proceedings of the Royal Society, vol.52 (1892), pp.176-191. Printed as figure 6 plate 5 in the published paper.
The image is inscribed below in ink: ‘No.VI’ and in pencil ‘2/3’. Imprint details verso.
William George Armstrong, Baron Armstrong (1810-1900) armaments manufacturer and industrialist was elected a Fellow of the Royal Society in 1846.
Associated place