William A. Radford · Radford Architectural Company · leaf 18
y weighed at the followingperiods: Thirty minutes, four hours, andforty-eight hours, respectively, from thetime of immersion, being replaced in thewater in each case as soon as the weightis taken. Its compressive strength whilestill wet, is then determined at the end ofthe forty-eight hours period,… … Fig. 18—Section showing the lower joist, lining, paper,flooring, base board and quarter round, sheath-ing and block at union of the first floor level. freezing mixture or a refrigerator, orotherwise subjected to a temperature ofless than 15 degrees F. for at least 12hours. It is then removed and…
