I.C.S. reference library : a series of textbooks prepared for the students of the International Correspondence Schools and containing in permanent form the instruction papers examination questions, and keys used in their various courses (1904)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 419
t passesthrough the remaining coils only. 52, Rheostats in which the resistance is adjusted bymeans of removable plugs are employed in laboratory prac-tice, where small currents are used and where great ac<^uracyis required. The resistance coils in these rheostats areenclosed in a wooden box,… … Fig. 39. operation of adjusting the resistance by means of the remov-able plugs can be seen from the diagram in Fig. 40. Thecontact pieces «, b, c, etc. are arranged side by side on thetop of the case and are separated from one another by a smallair space. The ends of each contact piece are…
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