| Show valuable mechanical device although electro deposition Is one of the oldest arts in which electricity Is practically employed some remark able improvements have been made in it during the last few years ono of tho the most moat novel of these is a mechanical ch anical device for plating small ar tides such as screws or pins which formerly had been strung by hand on wires or plated in baskets The these seare are now dumped ino injo a porous barrel placed into tho the plating solution and re r evolved by machi machinery nerv |
