Fritts, Charles Edgar. [from old catalog] · Philadelphia, The Keystone · leaf 334
the bottom exposed, toprevent loss of heat by radiation,and preserve a more uniformtemperature. (753-) Adjusting-oven.—A verycomplete apparatus, and one notexpensive, can be made as shownin Fig. 52. This consists of areservoir containing water, madeof zinc or copper, the bottomportion about eight… … Fig. 52. 322 THE WATCH ADJUSTERS MANUAL. closed over at the top, and have each a short pipe extending tothe outside of the casing, for use both in putting in water, andallowing the safe escape of the vapor arising from the heatedliquid. These tubes should ordinarily be stopped with a looseplug of…
Clocks and watches
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