Wolff, Alfred R · New York, J. Wiley & sons · leaf 80
surrounding the exte-rior of the dome, turning it until the wind no longermoves the auxiliary windmill vanes, when the sails properwill be exactly in their best position to receive the im-pulse of the wind. Figs. 7 and 8 represent the upper or distinctiveportion of the tower windmill, with Cubitts… … Fig. 7. is a wooden curb attached firmly to the top of the wall,and upon which the rollers of the cap revolve. It iscommonly secured either to timbers built in the brick- 64 THE WINDMILL AS A PRIME MOVER. work, or to long iron rods which extend to a considerabledistance down the walls. BBB is the…
Windmills
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