To the Editor of the "Nonri-Cuiwa Datty News"
'Si—Will one of your kindly disposed readers be so good as to resolve the following question for me? The motor of a G. E. table fan is to be used to rotate, by worm-gear, a wheel one foot in' diameter once in 50 seconds: what should be the diameter and pitch of the worm? The load on the motor will be preserved at normality by shortening or, if necessary, removing, the fan-
With anticipatory thanks to you Tam, ete, Shanghai, Oct. 3, 1096,
Text read from the printed page and cleaned; old type leaves the occasional error.