Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 373
Temperature Controllers—Interior Constmetion. This illustration has been inserted to show the sim-plicity of the Foxboru Controllers. The air control valve is operated by our helical tube,which has proven so successful in Foxboro RecordingThermometers. There is absolutely nothing in this… … Portable Taclionieters. (Dr. Horn System.) These Tachometers are the most accurate, compact anddurable on the market. Thousands of them are dailylii-oving their efficiency. They are single spindle, multi-speed Tachometers and are absolutely Dead Beat. The Dr .Horn system is considered standard, the…
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