Date: January 20, 1891
Creator: Logan, Thomas H.
Description: Patent for a new and improved artesian-well borer. This design "will be actuated by the weight of the connecting-rods and sink-wells in rock, gravel, earth, or sand without the use of water" (lines 13-16). It consists "[i]n an earth or rock auger, the combination, with a tube and a shank reciprocating in said tube and adapted to operate the auger, of dogs adapted to be projected through the tube by the reciprocation of the shank to engage the well-casing and hold the said tube from rotary movement" (lines 62-68).
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