Four gallons of water was required for satisfactorily rinsing each bushel of pears when woodwool was present in the bottom of the box to prevent bruising, after treatment in one per cent hydrochloric, but only two gallons per bushel were required after treatment in half percent, to avoid injury.
Source: wiktionary
One case of each variety was packed in sulphite paper and woodwool, a $4 bushel case was used, the bunches being wrapped in the sulphite paper and nested in the woodwool.
Source: wiktionary
J22: Proprietary roof decking with asphalt finish deals with prefabricated roof decking (steel, aluminium, timber, woodwool, etc), together with vapour barriers, insulation and asphalt covering and finishes intalled as a complete roof by a specialist firm.
Source: wiktionary
Woodwool can soften when wet, and might well have been standing out in rainy conditions before concreting started.
Source: wiktionary