. Le journal de chemin de fer et d'ingénierie . Medusa, la grande gravure étant une vue générale, prendre d'une photo ; fig. 2, une vue latérale montrant l'arrangement général du navire ; fig. 3, un plan de pont, et fig. 4, demi-section transversale, montrant l'arrangement des coalbunkers, etc. La Medusa appartient à un type distinct, intitulé la classe Medea, qui a d'abord consisté en cinq navires seulement, mais a ensuite, sous le nouveau pro-gramme Admiralty, développé en un extensif,£^t«kJ avec des dimensions augmentées et diverses modifications. Il embrasse beaucoup de nouveautés dans la conception et la construction, et réprimen

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. The railroad and engineering journal . Medusa, the large engraving being a general view, takenfrom a photograph ; fig. 2, a side view showing the generalarrangement of the ship ; fig. 3, a deck plan, and fig. 4, ahalf cross-section, showing the arrangement of the coalbunkers, etc. The Medusa belongs to a distinct type, entitled the Medea class, which first consisted of five vessels only, but has subsequently, under the new Admiralty pro-gramme, developed into an extensive, £^t«Kj with increasedsize and various modifications. It embraces many newfeatures in design and construction, and represents anauxiliary arm to the fighting line, consisting of heavy ar-mored battleships alone ; just as of old, the swift frigateswere necessary adjuncts of the great line of two and three-deckers. As the five cruisers of the group alluded to aresimilar in most respects, it appears convenient to describethem generically. They are the Medea. Medusa, Melpom-ene, Magicienne and Mara/hon. The first two were 492 THE RAILROAD AND [November, iSgo.. I-*< X1/) 03 < DQW u(/) c^ Q u H ow HO CL, W w t/) c/)(/I< u QZ oo Vol. LXIV, No. II.] ENGINEERING JOURNAL. 493 built at Chatham, the Melpomene at Portsmouth, and thetwo last-named in the yard of the Fairfield Shipbuilding &Engineering Company at Govan, Glasgow. The vesselsare alike in their dimensions and in their internal arrange-ments, but the constructive materials and engines aredifferent. The Medea and Medusa are built entirely ofsteel, and their displacement tonnage is 2, 800 tons. Theirengines are placed vertically, with inverted cylinders.They were designed to realize a speed of 20 knots ; andfor tne purpose of showing at what an enormous expendi-ture of energy these high speeds are attained, it may bementioned that the Medea, with a displacement of 2, 800tons, is fitted with engines of substantially the same in-dicated H.P. as the i6i-knot armor-clad Collingiuood, with a displacement of 9, 500 tons, or between three andfour times

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