. American engineer and railroad journal . record was obtained. Thesetests were made in May and June last, but theresults, we believe, have not been made publicuntil the present time. If all the conditions of the trial are considered,it will be seen that the extraordinary result ob-tained was not due to the weight or form of the shot used with the 57-mm. Canet gun weighed kg., which does not differ materially from those used withother rapid-fire guns of the same caliber. Thus the projectileof the 57-mm. Giuson gun weighs kg. ; of the Hotchkiss, kg. ; of the
. American engineer and railroad journal . record was obtained. Thesetests were made in May and June last, but theresults, we believe, have not been made publicuntil the present time. If all the conditions of the trial are considered,it will be seen that the extraordinary result ob-tained was not due to the weight or form of the shot used with the 57-mm. Canet gun weighed kg., which does not differ materially from those used withother rapid-fire guns of the same caliber. Thus the projectileof the 57-mm. Giuson gun weighs kg. ; of the Hotchkiss, kg. ; of the Krupp, kg., and of the Maxim, reason for the very high initial velocity is found in thegreat length of the bore of the Canet gun, and in the use of avery slow-burning powder. While the 57-mm. Gtiison, Krupp,Maxim and Hotchkiss rapid-fire guns have bores of the lengthsof 20, 30, 42 and 44 calibers respectively, the Canet has alength of bore of So calibers. The results obtained are given in the following table, in -v:^t ^^. The firm of Sir W. & Company, atElswick, England, has near-ly completed two cruisersfor the Brazilian Navy. Thefirst, the Kt-publUa, is 206ft. long, 35 It. beam, mean draft and tonsdisplacement. She has twinscrews and triple-expansionengines which can work upto 3 300 with forceddratt, giving a speed of 17knots. She carries six , four 6-pdr. rapid-fire guns, six machine gunsand four torpedo-tubes. The second ship, whichhai been named Tridenlts, is a twin-screw,, cruiser 173 ft. long, 30 ft. beam, draft and ,Soo tons displacement. Her armament willconsist of four 6-pdr. rapid-fire guns, four CRUISER TRIDENTES, FOR THE BRAZILIAN NAVY. which the original metrical figures have been reducedand pounds. The powders used were varieties of thenaval powders : to feetFrench 522 THE RAILROAD AND [November, 1892. No. of Weight of Kind of Weight of Initial Gas Pressure. * Shot. Proje
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