28 THE GRAPE. 



the roof, and are more exposed to the changes of tempera- 

 ture, their action also will be impeded by being cramped, 

 but a greater distance than is actually required is objec- 

 tionable, as the nearer the glass the better. 



For a large house, a tank that will hold about two hun- 

 dred gallons will be requisite, and for a smaller house, 

 one in proportion. This tank during the earlier growing 

 season ought to be kept full of water, so that when used 

 it may be of the same temperature as the inside of the 

 house. Cold water applied immediately from an under- 

 ground cistern, or well, suddenly checks the action of all 

 plants, and ought by all means to be guarded against. 

 The force-pump may be attached to the tank, and if an 

 air-tight metal globe be fixed over the discharge pipe, on 

 the same principle as a fire engine, a steady stream will 

 be propelled through the hose. By having two faucets on 

 the lower pipes, one leading to the tank, and the other 

 from the cistern below, there is no need for two pumps, as 

 they may be shut, and opened, so as to answer the double 

 purpose of drawing water from the cistern, or distributing 

 it from the tank over the house. For a small grapery 

 where economy is an object, a common syringe may be 

 used instead of the hose, but in a large house the force- 

 pump is more economical, and has the advantage of ena- 

 bling the operator to drive the water well into the crevices 

 of the wood-work, which greatly assists in keeping clear 

 of insects. 



If there is not a good supply of soft water close at hand, 

 it is desirable to have a cistern sunk under or immediately 

 near the house, and the water conveyed into it from the 

 roof by gutters and pipe, which saves much labor, beside 

 the benefit of always having rain water, which is the best 

 for all plants. 



The situation of the Cold Grapery is a matter of import- 



