Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 591
d so evidently inde-pendent of the structure of the film, that it seems aliuostcertain that the nature of the fihu had very little to do withthe direction taken by the spark. Figs. 548 to 552, inclusive, are photo-micrographs of vari-ous marks produced in the manner described, taken under… … Fig. 549.
Physics · Lantern projection · Electric apparatus and appliances
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