two disks, B. These disks are mounted on a Aug. 8,1871. to the plain sheet metal roofing, and it is claimed to excel the jointed shaft, as shown in the horizontal section (Fig. 2), the Fig. 1 represents the roofing partly applied to the roof and corrugated; while the same weight of metal in the… … wood are nailed to, and at right angles with, absence of the springs mentioned) all the air BELT'S SHEET IRON ROOFING. them, two feet apart between centers, so as to which enters the bellows is discharged fit under the crimps and support the sheets. Or boards three through the educt'on pipe> an<i…
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