Architect and engineer . Royal pairfrom a young active colony, twice natural The enlargement of thequeens abdomen is noticeable, (e) Seal made over the mouth of a 5 16-inch vial, three times natural size. is the practice in the case of treated woods,that it meet definite specifications involvinglaboratory tests of samples, which will in-sure that it contains the proper percentageof effective extractives. Some woods, such as Port Orford cedar,contain a considerable part of the extractivein the form of volatile oils which afford theprincipal source of the resistance of thesewoods to termi
Architect and engineer . Royal pairfrom a young active colony, twice natural The enlargement of thequeens abdomen is noticeable, (e) Seal made over the mouth of a 5 16-inch vial, three times natural size. is the practice in the case of treated woods,that it meet definite specifications involvinglaboratory tests of samples, which will in-sure that it contains the proper percentageof effective extractives. Some woods, such as Port Orford cedar,contain a considerable part of the extractivein the form of volatile oils which afford theprincipal source of the resistance of thesewoods to termites. In nature termites will rence. The natural preservatives in woodare water soluble, and field observationssuggest that prolonged weathering makesfor susceptibility to termite attack. Termites Attack Stadium When the Stanford University Stadiumwas constructed in 1921 redwood mudsillswere used for the support of the seatboards. These mudsills were later de- THE ARCHITECT AND ENGINEER -^ 42 ^ MARCH. NINETEEN THIRTY-FOUR.
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