is about ten truck may be rolled out from under the tank and times that of copper. If German silver wire cannot be placed on the main truck. conveniently procured, iron wire may be substituted. » « » I » EHEOSTAT AND RESISTANCE COLUMN,* In this case the coils will have to be longer. Besides the… … order of brass or other metals. Fig. l.-GEEMAN SILVER RHEOSTAT. Ohms. Ft. Ohms. Ft. 1 37!^ No. 84 Am. W. G. 6 56 No. 30 Am. W. G. IMPROVED LOCK AND SHACKLE FOR RAILWAY requires adjustable resistances for heavy and lightcur- 2 75 No.24 " " 18 70i^No.32 " SWITCHES. rents, which need be only…
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