Issue 4 and Volume 22.

AN ELECTRIC FIRE LADDER. David H. Irving, of Boston, has invented a fire ladder, which, he claims, will render it possible for a fire department to handle fires in the top story of the highest building. The ladder is at the same time compact and needs only the usual number of horses to haul it to a fire; as, though heavy, it is not much heavier, and is less cumbersome than the hook and ladder truck in everyday use. It takes up less space and can turn corners, where the ordinary hook and ladder truck would come to a standstill. The Irving ladder is an electric one, and can be worked (as in Boston) by a dynamo or run in smaller places by steam or by a storage battery. It has also a hand arrangement, by which it can be unwound incases where there is neither steam nor dynamo—thereby making…

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