Scientific American. [DECEMBER 15, 1888. 37° Boracice Acid as a Preservative. Compressed Air for Blast in Cupola Furnaces. AN IMPROVED FREIGHT CAR, An improvement providing a box freight car with doors extending the entire length of the car, with means for operating and securing them, has been pa-… … HARTMANN’S FREIGHT CAR. be simply and expeditiously removed from door may be placed horizontally on suitable the body of a wheel when broken, is illus- supports, such as a wagon from which arti- the Birmingham Compressed Air Power Company. cles are being loaded into the car, when the upper door…
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