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pots ; a circular piece of the same material, of about 

 au inch in thickness, having been inverted, unbroken, 

 to occupy the bottom of each pot.* This substance, 

 so applied, affords efficient means for draining off 

 superfluous water, and subsequently of facilitating the 

 removal of a plant from one pot to another, without 

 loss of roots. The surface of the reduced turf was 

 covered with a layer of vegetable mould obtained 

 from decayed leaves, and of sandy loam, to prevent 

 the growth of the grass roots. The pots were then 

 placed to stand upon brick piers, near the glass ; and 

 the piers being formed of loose bricks, without 

 mortar, were capable of being reduced as the height 

 of the plants increased. f The temperature of the 



* From Mr. Knight's recommendation of chopping the soil 

 small, and pressing it together while wet, we entirely disagree. 

 We find no plant thrive and root so readily, receiving the least 

 possible check afterwards, as the pine apple does when potted 

 or planted whilst the soil is in a moderately dry, friable condi- 

 tion. After which, it is beneficial to apply the requisite quan- 

 tum of water, either to the soil or over the foliage, according 

 to circumstances of season, &c. Besides, it would be necessary, 

 if green grass were made use of, to employ some other compo- 

 sition to prevent the grass from growing. From this we also 

 quite disagree, and should never think of putting it into 

 practice. 



f It did not seem to strike this great man how bottom heat 

 could be genially modified, within the same structure, with little 

 trouble, and economising the expense and labour at the same 



