delicate work is supposed to be the most opaque to these magnetic radiations, plate and left for a time, the plate, when developed, to be buried waiting for the brazing. The joint to possibly by converting the energy of the waves into will show a clearly defined image of the object. Posi- be brazed… … drop forgings, will need to be cleaned off by some objects were placed on the plate, and the plate was other treatment, in which a file or scraper will be wrapped in several folds of black paper in the dark Fig. l.-ABBANGEMENT OF MAGNET AND PLATE found useful. With sheet iron a joint can be brazed…
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