. The street railway review . matter. The outer and inner circumference of each plate was leftrough and extended beyond the face of the cast rim segments,which were merely rough turned. The last layer of plates wasprovideil with countersunk anored holes, designed toreceive the expanded rivet heads. Bolts with nuts and washerswere used to erect the plates, and these were replaced by rivetshydranlically driven, but to properly prepare the holes for rivetsit was necessary to ream out all holes with a special machine after.

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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads