210 FARMERS ASSISTANT. 



Then take another strip of twelve feet wide, adjoining that 

 already watered, and thus proceed until the whole has been 

 gone over. 



In this way, one Man could carry out, say, forty cartloads 

 a day, at the distance of half a mile, or half that number, if 

 a mile ; as but little time need be spent, either in loading 

 or unloading. About ten loads, of a hundred gallons each, 

 would probably be sufficient for an acre at any one time. 



But this is not all that may be done with seawater: It 

 may be drove any distance into a country, in aqueducts for 

 the purpose, with the aid of wind-machinery. Say, for in- 

 stance, that it can be drove on ascending lands, to the 

 height of an hundred feet, with one wheel and crank turned 

 by the wind. When raised that height, and emptied into a 

 cistern for the purpose, it may, in the same way, be drove 

 up to the height of another hundred feet, by another wheel 

 and crank turned as before; and so on to any given height 

 required. So that the highest cultivable lands, or those 

 most remote from the sea, may in this way, and with the 

 cart before described, be manured with seawater. 



The sprinkling of the water over the land may be done 

 at a small expense, as we have just shown. The principal 

 expense therefore is the aqueducts for carrying the water. 

 These, if made of wood, would probably cost a thousand 

 dollars a mile, including all other necessary apparatus. 

 Every mile in length would serve for two square miles of 

 land. The wood forming the aqueducts, being constantly 

 saturated with salt-water, would probably last a century. 

 The expense, at this rate, would fall short of ten cents per 

 acre, by the year. 



In addition to the use of the water for manure, a great 

 saving could be made in the use of salt, for cattle, and in 

 various other ways in which this liquid might be, in part, a 

 substitute for that article. 



The method of driving water up an aqueduct is by a 

 plunger, and two valves; one within the aqueduct to keep 

 the water from returning, as the plunger is drawn back by 

 the crank; the other within the plunger; and, while this is 

 receding, its valve opens to let in more water, and shuts 

 again while the plunger is advancing ; and at this time the 

 other valve opens to let the fresh supply of water pass 

 through it. Thus, the valves open and shut alternately, 

 similar to those in a common pump. 



Whether the advantages to be derived, from puting a 

 plan of this kind into operation, would warrant the expense, 

 must depend on the result of experiments to be properly 

 made. 



On some parts of our seacoast it would be impracticable; 

 particularly on most of that of North-carolina; where the 



