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918,215
curing said central portion to said shaft, out- wardly-extending agitating portions lying in substantially a horizontal plane, and down- wardly-extending terminal portions consti- 5 outing packers and movable adjacent said flange. In testimony whereof I have signed my
name to this specification in the presence of two subscribing witnesses. ROBERT JAMES STEEN. Witnesses: JAS. URY CRANFORD, M. P. GARNER.