JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE II, 
Illustrating Mr. Lewis’s paper on the Microscopic Effects of 
the Electric Spark. 
Fig. 
1 Partematin by electric sparks from an induction-coil through coarse 
blue-laid post paper. 
a. Scorched margin. 
b. Perforation. 
ce. Disrupted fibres. 
2.—Perforations by same through thick card. 
3,—Ditto through varnished card. 
4.—Ditto through thick cream-laid note-paper. 
5.—Ditto through insulating waxed paper. 
6.—Leyden-jar sparks through thick card. 
7.—Induction-coil sparks through thin microscope glass. 
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