CULTURE OF THE GRAPE. 297 



through a pulley screwed to the roof, descend to the 

 lower end of the pushers, which are attached to the lower 

 side of the shutters. The cords being tight, when the rod 

 is drawn, the lower end of the pusher will be drawn up 

 towards the pulley, and thus the sash will be pushed up. 



At the end of the house, a strong rope is fastened to 

 the iron rod, which, passing over a wheel, descends to a 

 windlass or a simple lever, which may be made sufficiently 

 powerful to raise all the sashes at a single stroke. Any 

 ingenious mechanic can so arrange the pushers as to pre- 

 vent the sashes from being blown open or raised too far 

 by the wind. The ventilator may be made of indefinite 

 length, extending even to the entire length of the house, 

 by having a number of pushers attached at suitable dis- 

 tances, so that the ventilator may be raised evenly in all 

 parts. This simple contrivance will save a vast amount 

 of labor involved by the old methods. A water-tank and 

 a force-pump, with rubber-hose, are the only requisite ap- 

 purtenances to a cold grapery. The tank is formed by 

 digging a hole in the ground, and lining its face with two 

 coats of common New-Jersey cement, either arching the 

 top with brick, or covering with plank. For a house fifty 

 feet long and twenty feet wide, a cistern ten feet in diam- 

 eter each way will prove sufficient. The house should 



