Correspondence.

A Motor "Growler" Wanted. The Editor, " THE COMMERCIAL MOTOR." Sir -I observe, in the correspondence columns of the issue of your journal for last week, that my letter,......

Ball Bearings For Heavy Work.

The ball bearing which we illustrate :)y two views on this page is the " F. end S.," for which The " Tormo " Manufacturing Company (H. and D. Friedenhain), of 67 and 68, Bunhill......