Page:Popular Science Monthly Volume 92.djvu/255

 Do It with Tools and Machines

���In upper right hand cor- ner, a portable shop tank for delivering oils and compounds to machines

��At right, a new type of lightning rod, made of numerous copper wires woven into a tight web

��Car rails wear quickly at a spot slightly ground out by slipping wheels, but with this portable grinder the rail's surface is quickly smoothed to the level of the depression

Below, a machine which punches or blanks un- cured rubber stock from the rubber calendars, and which is to be used to manufacture rub- ber shoe heels, water bottles and other articles

��Nothing is more annoying to the steam fitter than to have a pipe wrench slip when turning a pipe. Above, a large wrench which a man can trust to hold his weight

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