A 1929 article from The Melliand reporting power and spindle-speed tests carried out in silk throwing mills in the Scranton-Wilkes-Barre district. It traces speed losses from motor to pulley, belt, whorl and spindle (13/16" versus 1" whorls) and measures power use with and without bobbins. It argues that higher spindle speeds raise power cost per pound, and ends with a table of kilowatt-hours per pound for yarns from 2 to 12 thread. Three graphs and one table illustrate the findings.