Educational woodworking for home and school (1908)
Park, Joseph C. (Joseph Charles), b. 1872 · New York, The Macmillan company · leaf 165
144 EDUCATIONAL WOODWORKING … Fig. 147. — Contactglue heater. Fig. 146, or a contact glue heater, where the jacketcomes in contact with a steam heater ring, Fig. 147,should be used for the sake of con-venience and economy. The steamcan be taken from the heating plant,which would be a saving of gas. Withsteam there is no danger…
Woodwork (Manual training)
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