. American engineer and railroad journal . tion that showed the inventor had an incep-tion of the true working conditions. The first pumps were made to operate under water, likethose of Bessemer ; and I conjecture the improvements men-tioned in connection with the exhibition at New York in 1830to be the addition of side suction pipes, because the pumpswere exhibited in public, which could not well have been doneif they were submerged. gwynnes centrifugal pumps. The Gwynne pumps, referred to in the writings beforenamed, are of American origin. They were at first an at-tempted and doubtful impro
. American engineer and railroad journal . tion that showed the inventor had an incep-tion of the true working conditions. The first pumps were made to operate under water, likethose of Bessemer ; and I conjecture the improvements men-tioned in connection with the exhibition at New York in 1830to be the addition of side suction pipes, because the pumpswere exhibited in public, which could not well have been doneif they were submerged. gwynnes centrifugal pumps. The Gwynne pumps, referred to in the writings beforenamed, are of American origin. They were at first an at-tempted and doubtful improvement on American methods wellknown and successfully applied at the lime ; not only this,the first experiments of Mr. J. S. Gwynne, the senior brotheramong those of the name now comprising the firm of Gwynne &Co., and J. & II. Gwynne, of London, England, were made inPittsburgh, Pa., iu 1844. The first pump made by Mr. Gwynnewas for the Passaic copper mine, in New Jersey, the locationof which I am unable to ascertain at this Fig- 13-THE MASSACHUSETTS PUMP. 462 THE! AMERICAN ENGINEER [October, 1894. FTlCr. Gwynnes first patent was taken out in the UnitedStates, from Xew York, where he then resided, and where hecontinued to reside for some rears after the great contest andcontroversy with Appold at the London Exhibition of 1851,when such pumps were for the first time publicly exhibited inEurope. The pumps shown there by Mr. Gwynne were called•• Gwvnnes American Pumps, and it was, no doubt, in somemeasure, due to this fact that the controversy arose betweenhe. Easton & .Ymos—now Easton & Anderson, who exhibitedthe Appold pumps—also with the makers of what is called theBessemer pump, as will be hereafter explained. I think the term Gwynnes American Pump was hardlycorrect, because Mr. Gwynnes alleged improvements on theAmerican pumps, as before intimated, were of questionablevalue, as he would no doubt now admit; at least they formno part of his present practice, and,
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