Scientific American Volume 12 Numéro 22 (mai 1865) . ge du jet de vapeur. Ce ventilateur est conçu pour fixer dans le corps de l'thefurnace au-dessous de la grille, et l'externe est un ironbox, A, avec portes, B, l'ouverture vers l'extérieur. À l'intérieur de l'acier en utilisation constante sur la ligne, et compte tenu de l'theyhave plus grande satisfaction. Ces n'ont pas, cependant, été suffisamment longtemps à l'opération d'enablea Rapport à établir entre eux et fer theordinary des portions de la locomotives ; mais il y a des raisons de croire que l'économie au point d'être wearwill égale à celle effectuée par la substitution pour ofsteel

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Scientific American Volume 12 Number 22 (May 1865) . ge of the steam jet. This blower is designed to set in the casing of thefurnace below the grate, and is externally a cast-ironbox, A, with doors, B, opening outward. Inside the made of steel in constant use on the line, and theyhave given the greatest satisfaction. These have not, however, been sufficiently long In operation to enablea comparison to be drawn between them and theordinary iron portions of the locomotives; but thereis reason to believe that the saving in point of wearwill be equal to that effected by the substitution ofsteel for ordinary iron tires. The ordinary eccentricsare expensive to keep up, but those which are madeof hardened steel do not require any looking afterfor ten years, not even to the slackening of a bolt, sofar as regards repairs. The experience obtained onthis, and we believe on some other railways, pointsto a very important mode of saving in one of thelargest items of cost in the working expenses of rail-ways. The subject will, we have no doubt, receive. STRANGE AND HUNTLEYS AEROVAPOR BLOWER. box there are pipes, C, Fig. 2, which support a hol-low bearing, D, Fig. 2, 4n which the shaft of the windwheel, E, Fig. 2, runs. These pipes are perforatedwith small holes, F, through which steam is forcedagainst the wheel, E; this causes it to revolve rapid-ly, creating a current of air through the box whenthe doors, B, are open the steam, which may besupplied directly from the boiler or the exhaust, isadmitted by the globe valve, G, and the doors areclosed and held so, when desirable, by catches, E, Fig. 1. The inventors claim that the combined effect of theair and steam is better than steam alone, and thatthe decomposition of the steam by the heat of thefurnace adds to the efficiency of the fuel, so that itis economical to use. When the air is not required, the outer doors may be kept shut, and the wheellocked or allowed to rotate at will. This blower maybe applied to steamboats, locomotives,

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