. Scientific American Volume 88 Number 12 (March 1903). THE AMERICAN THERMO-CALL BUTTON discovers and reports fire be attached to the existing wires inhotels and manufacturing plants. Inval-uable as a life and property saver inresidences. No possible chance for fireto secure headway without soundingalarm. Permanent, not Thermo-Call Co., Boston, rs. of thermostatic devices of all kinds Universal Safety Tread Made to walk on with perfect safety.

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