(Report 56.) [From 5th annual report.] † Distribution Made by Issuing Office.
Notes:
CONTENTS.—Pt. 1, Method of measuring heat energy of ignition sparks; by F. B. Silsbee, L. B. Loeb, and E. L. Fonseca.—Pt. 2, Measurement of heat energy per spark of various ignition systems; by F. B. Silsbee and E. L. Fonseca.