moval from the field. The balance of the The inventor is Mr. R. J. Colvin, of Lancaster, Pa., and shown in the engraving, serves to disconnect the pump gear- invention is a very easy and expeditious manner of convert- the date of the patent is April 22, 1873. ing, when the services of the roller… … the forks. The latter are roller it possesses the same ad- shown in the engraving in vantages as any ordinary land two forms; those marked F roller, being adjustable in are spring forks, the tines of which are coiled to form eyes, present owner of the invention, Mr. M. T. Boyer, of Parks- weight,…
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