Fritts, Charles Edgar. [from old catalog] · Philadelphia, The Keystone · leaf 39
ratus, because you will under-stand the philosophy of its management and operation, and canwork with greater certainty and rapidity. (51.) Care of inag?iets.—Permanent magnets should alwaysbe arranged in a closed magnetic circuit while not in actual use,(i.e., their poles connected by soft iron,)… … 26 THE WATCH ADJUSTERS MANUAL. ing the circuit with magnetic metal. The keepers must ofcourse be removed while using the magnet. Bar magnets canbe preserved in the same way, as shown in Fig. 5, where b b are two bar magnets and k k aresoft iron pieces or keepers, toconnect their ends. The polesof…
Clocks and watches
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