San Francisco : Architect and Engineer, Inc · leaf 296
f pilot operatedapparatus, for truly modulatedoperation by Johnson gradual act-ing instruments, with adjustablesensitivity, is the very latestword in precise synchronizing ofcontrol devices. Ask to see a John-son engineer from a nearby branchoffice or send for detailed bulletins.Johnson Service… … risen ion and Immersion Thermostatsith Johnsons distinctive sensitivitycalibrated on the job to totled apparatus JOHNSON /hctamdtic TEMPERATURE ANDAIR CONDITIONING CsGrifo&&> AUGUST, 1940
Architecture · Building
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