Abstract
Journal of the Franklin Institute, June.—On the several efficiencies of the steam-engine, and on the conditions of maximum economy (continued), by R. H. Thurston.—Ninety miles in sixty minutes (continued), by W. B. Le Van.—Ringing bells, by J. W. Nystrom.—Radio-dynamics; universal phyllotaxy, by P. E. Chase.—A thermograph, a new apparatus for making a continuous graphical record of the variations of temperature, by G. M. Eldridge.—Electricity, by A. E. Outerbridge, jun.—An essay on mechanics and the progress of mechanical science, 1824–82, by F. Finley.—Device for increasing the dynamic effect of the pulsations of diaphragms and the like, by W. B. Cooper.—Influence of pulley-diameter on the driving power of flat belts, by R. Grimshaw.—Recent improvements in the mechanic arts, by F. B. Brock.
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