CONSTRUCTING A PUMP JACK Collection of Old Worn-Out Machinery Improvised Into Serviceable Apparatus Ap-paratus for Farm. Around nearly every farm one will find a collection of worn-out machinery that is worth a few cents as junk but with a little, ingenuity the average farmer can make it yield him a better profit, writes Edward B. Chalk in the Farmers Mail and Breeze. On this farm I made a pump jack out of an old windmill head. The boxings were re-babbited re-babbited and on the shaft which car- Improvised Pump Jack. ried the large wheel a pulley was placed. A couple of heavy blocks of wood were buried near the pump and a platform fastened to them. On this platform my jack was set up. In the top of an upright piece a walking i beam was pivoted as shown in the cut, one end being fastened to the pump rod and the other connecting with the geared wheel of the windmil' head.