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ture, for they have no mean influence, and if well 

 managed, there would be certain parts of the seasons 

 when both tank and pipe heat could readily be dis- 

 pensed with, or either one or the other, according to 

 circumstances ; it would be a grand point to have the 

 full command when requisite of the whole, and if 

 well managed, would grow pine plants and swell their 

 fruit to an extent beyond all previous attainment. 

 Of course such application of fermented materials 

 could be confined out of sight, by building an out- 

 side wall or sinking a trench, if the pit or structure 

 is a sunk one, (which is a practice we do not approve,) 

 and it could readily be covered with shutters, which 

 would form a platform to walk on to get at the pit 

 more conveniently from the outside. 



All the pitch that is necessary in the roof of a pine 

 pit is just what is sufficient to throw off the rain-water 

 that falls upon it. It is known that the pine apple 

 plant luxuriates in a moist atmosphere ; and, if that 

 fact is admitted, there then can be no doubt as to a 

 fiat roof being the mx)st conducive to produce that 

 effect. On the contrary, if a dry atmosphere be re- 

 quired, by all means have the pitch or angle of your 

 glass roof as much greater as is convenient, as there 

 cannot be a doubt that the greater the angle of the 

 glass roof is the greater will be the heat collected from 

 the rays of the sun, and consequently the more arid 

 the atmosphere. {Mills on Pine Apple, 4.) 



