, and consequently the separating from itself. It is evident that an electric less the resistance. If you use spot xw as the center current through the air takes a crooked course. and circumscrib¢ a circle one inch in diameter and a Fig. 6, made with a camera, shows the spark pass- concentric… … cylinder so.as to cover the film for thé distance of an Fig. 11. inch from either end. Around this cylinder was rolled another strip of sensitive film with the sensitive sur- ally outward course, the limits of the outer circle, it face inward; and around this was rolled light-proof 542. Nearly…
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