Electrical measuring instruments : grand prize Louisiana Purchase Exposition, St. Louis, 1904 (1904)
Leeds and Northrup Company · leaf 35
ry great. With the Rosa curve tracer the most laborious parts of the operation(setting the contact brush, taking, recording and reducing the readingsand plotting the curve) are done by the machine automatically, and thewftrk of several hours may be done in as many minutes. The measure-ments are… … Ju;. Speed, voltage and other circmnstances may be maintained more nearlyconstant than would be possible when the observations extend overseveral hom-s, Ior these reasons the cur\es obtained are more accuratethan any ever before published. The method of the curve tracer is illustrated in Iig. ,^ A…
