Abstract :
J. R. Craighead: Mr. Curtis has given a great deal of attention to pushing the use of the oscillograph into fields decidedly beyond that for which the device was originally designed. The fundamentals of the oscillograph (that is, the natural frequency of the vibrator, and the photographic ability of light which can be placed upon the film) are such that values of the order that Mr. Curtis speaks of can be attained, but the general mechanical construction, and details, have been laid out with a view to practical operation in the shop and in power stations, rather than reaching the extreme values which Mr. Curtis has attained.
