A Course for Ground Engineers: IV.—Hints on the Inspection and Treatment of Metallic Materials from the point of view of the “B” or “D” Licence Holder

IN this article it is proposed to deal with that wide range of aircraft material which is grouped under the heading of metallic materials. Ground Engineers of all categories should possess a sound knowledge of the material which they handle, and this knowledge is a definite requirement for a Gound Engineer's licence in Categories “B” and “D.” The impossibility of an exhaustive treatment of this subject in an article of this nature must be appreciated, and little can be done but to direct attention to the more salient points. Readers are reminded that many excellent text‐books dealing with Metallurgy are to be obtained and that a study of such books will be found both interesting and profitable.