sup- among non-resinous woods, those which have least sap ing courses. posed that something of the kind also occurs when the or guin in them, arein general the strongest and most Piers for the approaches not to be solid work, but lasting. 8. It is stated by some authors that in fir lightened by… … DOUBLE PARABOLIC free from such blemishes as clefts or cracks radiating The coping, cornices, and parapets on the approach- suspension is vertical. The engineers have therefore from the center, ‘‘cup shakes” or cracks which par- es to be moulded as per details, but the general face arranged to…
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