Scientific American Volume 65 Number 20 (November 1891) . requirements of different mines, hard and soft coal,iron and other metals, and for high and low entries,and for gauges varying from eighteen inches to thestandard. The success of the apparatus already in-stalled has given great impetus to this branch of ap-plied electricity, and will undoubtedly result in thestill further use of electricity in mining operations. New Treatment of Diphtheria. The highly unsatisfactory state of the therapeuticsof this terrible destroyer of infantile life is assuredly innowise better shown than by the amoun
Scientific American Volume 65 Number 20 (November 1891) . requirements of different mines, hard and soft coal,iron and other metals, and for high and low entries,and for gauges varying from eighteen inches to thestandard. The success of the apparatus already in-stalled has given great impetus to this branch of ap-plied electricity, and will undoubtedly result in thestill further use of electricity in mining operations. New Treatment of Diphtheria. The highly unsatisfactory state of the therapeuticsof this terrible destroyer of infantile life is assuredly innowise better shown than by the amount of literatureconstantly devoted to the subject and the number ofsystems of treatment continually being nearly every drug in and out of the Pharma-copoeia has had its advocates, and still the sheaves aregarnered, and the edge of the sickle has not beenturned by drugs and systems. Professor Seibert proposes (Archives of Pediatrics,June, 1891) yet another system of treatment of pharyn-geal diphtheria, which is interesting from some points. THE OTTO GASOLINE ENGINE. The successful gasoline engine should, first of all, beSO constructed as to prevent any leak of gasoline eitherin vapor or fluid form, and it should besides be simplein design and reliable in operation for each functionbelonging to the cycle of work of the engine. TheOtto Gas Engine Works, of Philadelphia, who havemade a national reputation on their Ottogas engines, have endeavored to meetthese conditions, and the engine here-with illustrated represents the smallestsize of such an engine which they haverecently placed on the market. No sepa-rate apparatus is used for producingvapors, but the gasoline is conveyed tothe engine froin, a supply tank placed out-side of building, and only mixes with airwhen it reaches the engine cylinder,where it is fired at once. The igniting is done by a hot tube,which has been found so efficient adevice with the modern Otto gas engines,and this tube is heated by a flame,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectel, booksubjectengine
