TABLE OF CONTENTS Section I. Uses of wavemeters and decremeters 1 II. Fundamental principle of wavemeters; formulae 2-3 III. Component parts of wavemeters 4-7 IV. Care of wavemeters and decremeters 8-11 V. Coupling as applied to wavemeters and decremeters 12-15 VI. General directions for using a wavemeter at a transmitter 16-22 VII. General directions for using a wavemeter at a receiver 23-29 VIII. Measurement of inductance or capacity by the use of a wavemeter or decremeter 30 IX. Wavemeter, type SCR-60-C 31-40 X. Wavemeter, type SCR-61 41-50 XI. Wavemeters, types SCR-95, SCR-111, SCR-125, SCR-125-A, and SCR-128 51-65 XII. Wavemeter, type SCR-137 66-75 XIII. Heterodynes and autodynes as wavemeters 76-80 XIV. Theory of damping and its measurement by decremeter and wavemeter 81-89 XV. Decremeter, type SCR-87 90-100 XVI. Parts lists of sets 101-109