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character than the dress ground ; the principal cone to be a rude stone, three 

 or four feet above the pool, a hole being chilled through the middle of it to 

 admit of a proper sized pipe. The diameter of the stone may be from twelve 

 to eighteen inches at its summit, and proportionately thicker at the bottom, 

 which altogether should present a rough uneven surface, having larger and 

 smaller protuberances. This stone may be the principal one, rising out of 

 the midst of smaller long pointed ones of different heights, placed so near or 

 close to each other as to represent a natural splitting cone starting out 

 of a rocky island. The rock or island should be formed sufficiently solid 

 and extensive to allow of several smaller cones appearing from two to five 

 feet above water, according to the magnitude of the design; or cones may 

 be formed more conveniently without the centre stone above named, by 

 a pile of pointed stones closely and connectedly placed, leaving a space for 

 the column of water to rise from a pipe concealed in the centre. The 

 scene will require varying by clusters of large stones rising just above the 

 water at intervals, pretty near the island, to suggest the idea of extent under 

 water. The margin of the pool in the same neighbourhood should also 

 represent a rocky appearance. Old pendent trees near the pool would 

 add much to the effect. If water is plentiful, a group of jets, three, five, 

 or more, rising out of these cones, would have an imposing effect. I 

 directed the arrangement of a group of five in a gentleman's grounds, and 

 which are very pleasing. The centre one produced about an inch column, 

 the other four were about five-eighths of an inch, and the whole from five 

 to seven feet apart, rising out of small cones about two to three feet above the 

 water, which could not well be raised higher, to allow a slack between some of 

 the cones for the water or level of the pool to appear between. If the cones 

 were much further apart, the group of jets might perhaps appear too strag- 

 gling. Of course, if the column of water had considerable substance, from 

 five to nine feet would be proper ; the five rocky cones might then be made 

 bolder and still more natural. Amongst some of the stones in tlie island, a 

 few water plants, mosses, or other amphibious plants, might be introduced. 

 The main pipe, conducting the water from the bottom of the pool or reservoir 

 to the point for the jets, should be of iron, lead, or gutta percha, about four 

 inches bore, according to the supply required. For a group of jets similar to 

 those I have named, four inch bore will be necessary. Care should always 



