aned by this method have been STRUCTURE OF METAL SPECIMENS. raphy has been given. A metallograph is a pictorial found to be entirely free from any marine growth. BY J. F. SPRINGER. representation disclosing the structure of a metal speci- The gear itself is simple and^strong. Its manipulation In… … ing of the ship under treat- a photographic apparatus Chatelier apparatus for making metallography using "Liliput" focusing arc lamp as source of light. ment. suited to the production of The cost of cleaning a macrographs. This verti- vessel by this method is cal arrangement is espe- low. A…
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