400 Successful Method of managing Aquatic and Bog Plants. 



of water, it will sometimes stretch along the whole extent of 

 the rivulet which it inhabits. The species of Lemna spread 

 through all the divisions. A slighter fall than that given would 

 create too insignificant a current, and the water, besides 

 being liable to be impeded by the plants, might probably 

 become stagnant. 



The experience of several years has proved that the plants 

 not only do exceedingly well throughout the summer, the 

 stronger kinds not excepted (as Cicuta virosa, the species of 

 Ni/mphea, Acorus calamus, Sfc.) but also endure well the 

 winter ; the fall alluded to being sufficient to keep the water 

 from freezing, if the precaution be used to cut away the 

 herbage of the plants below the surface of the water, and 

 to cover the trough with a roof of boards, upon which horse 

 htter must be placed. By cutting down the plants, that 

 which would retard the flow of the water is removed, and 

 by the covering the frost is counteracted. 



In the troughs themselves, at various distances, from 

 one, two, and three feet or more, cross boards, or partitions 

 are inserted, which move in grooves, and serve both to check 

 the excessive spreading of the plants, and, on the other hand, 

 when removed, to add at pleasure to the space. These 

 partitions are somewhat lower than the troughs, in order to 

 allow the current of water to pass over them. 



The water required for this apparatus, is conducted from 

 the large upper reservoir by means of a leaden pipe of one 

 inch bore, into the first division of the troughs, where it is 

 discharged with a shoot, about the thickness, of a finger, 

 which is sufficient to supply all the troughs, to the extent of 

 five hundred feet, and even all the ground that is interposed. 



