August 31 1889. Price 10 cents. For sale by all newsdealers. PAGE I. BIOGRAPHY John Percy. S The life of the eminent metallurgical writer with notes of his works 394 Mr. CAREY LEA Note of recent results obtained in continuation of the researches of the author already published 398 Separation of copper from lead cadmium magnesium manga nese mercury zinc. etcBy E. VON KNoungPrecipitation of copper as nitroso-naphthol 398 The Reactions involved iu the Calcination of Portland Cement derstood processBy Mr. B. THWA1TE 398 cident; a leakage of current that produced metallic sodium 394
August 31 1889. Price 10 cents. For sale by all newsdealers. PAGE I. BIOGRAPHY John Percy. S The life of the eminent metallurgical writer with notes of his works 394 Mr. CAREY LEA Note of recent results obtained in continuation of the researches of the author already published 398 Separation of copper from lead cadmium magnesium manga nese mercury zinc. etcBy E. VON KNoungPrecipitation of copper as nitroso-naphthol 398 The Reactions involved iu the Calcination of Portland Cement derstood processBy Mr. B. THWA1TE 398 cident; a leakage of current that produced metallic sodium 394 Cable TelegraphyBy PATRICK BERNARD DELANYA re cent Franklin Institute lecture giving a graphic and popular ac count of the progress of ocean telegraphy with illustrations of the record illustrations . . 392 IV. CIVIL ENGINEERINGShip Canals in 1889By R. E. PEARY of a paper read by the distinguished author before the American Society of Civil Engineers giving a review of the aspect of the world's work in canals during theyear. 384 The Fort Madison Bridge across the MississipplDescription of this important work with illustration of the general aspect of the completed structure 386 V. MEDICINE AND HYGIENE' Hay Fever' Periodic Catarrh By Dr. G. ARCHIE STOCKWELL long and able paper giving this subject a very exhaustive treatment as to the cause and cure of the annoying disease 395 VI. MISCELLANEOUSNote on Wear of Gold Coin. 397 VII. NAVAL ENGINEER1NOr-Armor PlateThe history of plat ing shipsEarly attempts and present aspect of the subject W ith notes of its application to typical vessels and recenttrials of 19 Inch armor at illustrations 388 The British Battleship EdinburchA new illustration of this remarkable ship costing upward of $ cf her size displacement armament and other illustration 383 chines with final description of illustrations 391 Venetian Glass—By Dr. GUILTO SALVIATTA most intere
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