being open and the ventila- inches at the outset, passes to 40, 44, 48 inches and with glass-covered openings. tor above the auditorium closed. After the sprinkling In the first test the ventilation device above the stage apparatus had been turned on a lively spray was poured beyond. was closed,… … One of the Perforating Rams at Work. Ram for Testing the Resistance of the Ground, MECHANICAL COMPRESSION OF THE GROUND IN THE CONSTRUCTION OF FOUNDATIONS. open, the woven curtain being lowered. After the formly as possible, and their distance apart should steam and smoke escaping through the…
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