Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 14
thealtitude above or below sea level. When the mercury in the tube falls, that in the cistern rises in corresponding proportion,and vice versa, so that there is an ever-varying relation between the level of the mercury in thetube and the mercury in the cistern, which affects the accuracy of the… … 4 HEATING AND VENTILATION The cistern (Fig. 5) consists primarily of a heavy waUed glass cjlinder AA allowing the sur-face of the mercury B to be clearly seen. This cylinder is securely held between bolsters CC in a movable frame suitably mounted inthe base of the instrument. The bottom of the…
Building · Heating · Ventilation
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