exceptionally good, using the Ilocombined toning and fixing solution, or thecombined toning and fixing solution made forthe Aristotype paper. FOR EVERYBODY. 75 The Ruhmkorff Coil. This is a kind of induction coil invented byRuhmkorff. Originally the Ruhmkorff coilswere made in comparatively small… … figure 42. arated from each other by silk. Ritchie woundthe secondary in sections, each on a spool of thefinished diameter of the cell, but very short, re-quiring eight or ten such spools in a row to givethe requisite total length. These spools weremade of hard rubber, and could stand very…
X-rays · Fluorescence
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