Show mechanical HARTFORD conn may 28 special the principal subjects for consideration at the sessions of the american society of mechanical engineers this morning was tests of centrifugal pumping engines at sewerage station at chicago a topic which was ably presented by R 0 carpenter of ithaca N Y in addition john H barr of ithaca spoke upon current practice in engine proportions thomas gray of terre haute upon A continuous steam indicator A K mansfield of ohio upon the best load for compound steam engine many of the del gates participated this afternoon in an excursion by boat down abo connecticut river the papers at the concluding session this evening will bo presented by gus 0 Hennin new york city thomas gray and D S jacobus of hoboken Ho hoken new jersey |