WORK. Since the element of accident enters into so many of the causes of failure of spark plugs, it is of the highest importance that accurate statistical data be accumulated concerning the average life and ultimate nature of failure of a large number of plugs of various types used in a variety of… … BURERU OF STWPBfiBS planning to secure systematic statistical data by cooperation with the Signal Corps. Other work which should be undertaken as soon as possible in- cludes^ study of the mechanical strength of the plugs, a more inti- mate investigation of the deposition of carbon and of…
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