STRANDED WIRES.--With a conductor of a definite lenght, made of _Stranded_ Wires, the total _weight_ is _greater_, and the _Resistance less_ than is a similar length of Conductor with Wires _not_ Stranded. To convert--Inches to Millimetres multiply by 25.3994 Feet to Metres " .3048 Yards to Metres " .9144 Miles to Kilometres " .6214 Pounds to Kilogrammes " .45359 PEPARED BY WALTER T. GLOVER & CO., ELECTRICAL WIRE AND CABLE MAKERS, 25, BOOTH STREET MANCHESTER. * * * * * IRON FRAME GANG MILLS. The gang mill is regarded as possessing material advantages in the rapid and economical manufacture of lumber. Among the recent improvements tending to perfect such mills, those which are shown in the iron frame stock gang, manufactured by Wickes Bros., East Saginaw, Mich., are eminently valuable. Our large engraving represents one of these mills, constructed to be driven by belt, friction, or direct engine, as may be desired. The important requisite in this class of mills is such design and proportion of parts as will insure durability and continued movement at the highest speed, safely increasing the quantity and improving the quality of work done at a lesser feed, and admitting the use of thinner saws than is practical in the slower moving sash. These are among the advantages gained in the iron frame machine, overcoming the necessity of an expensive mill frame, saving time and expense in setting up, and avoiding the liability of decay or change of position. [Illustration: IMPROVED IRON FRAME GANG SAW MILL.]