(Report 51.) [From 5th annual report] † Distribution Made by Issuing Office.
Notes:
CONTENTS.—Pt. 1, Causes of failure of spark plugs; by F. B. Silsbee.—Pt. 2, Gas leakage in spark plugs; by L. B. Loeb, L. G. Sawyer, and E. L. Fonseca.—Pt. 3, Methods for testing spark plugs; by H. C. Dickinson, F. B. Silsbee, and P. G. Agnew.