360 HISTORY OF THE ROYAL BOTANIC GARDEN. 
thin layers between layers of peat earth, and after it has lain for 
some time, chop the whole up together, and turn it over at intervals, 
till the dung disappears, and the whole a paige Fi the appear- 
ance of black peat earth and sand; and where this manure is 
applied, about an equal eras. of ony: should be added (that is, 
about one-eighth part of the whole) in addition to the sand that I 
have before recommended to be mixed up with the earth. This, I 
know, can be used with very good effect; but, for all ordinary 
purposes, I consider it quite unnecessary, as there is no difficulty 
entioned without manure. I merely mention this, because I know 
it is the opinion of some that heaths will ae thrive with manure 
es to the peat earth in which they are grow 
w, however, that some heaths may be emp to a larger size, 
in the same space of time, with manure than without it; but, as 
have already mentioned, T = it quite unnecess ary for all 
ordinary purposes, and any person who wishes to try its effects 
should do so very sparingly at first, till he is enabled to judge of 
the effect produced by it, as a little excess of manure is sure to 
t 
should do so at first with great caution, with quite as much as in 
ane an excess of manure in its solid state. 
s, however, is wandering from my original purpose, as I do 
not intend to advance anything but what I can support from 
ee I shall, therefore, proceed to the ¢hird part, viz. :— 
III. The Different Shiftings Necessary. 
In shifting heaths from one pot or tub to another, I take any 
time from March till August, as opportunity will permit, or the state 
: a have shifted heaths as late as November, 
and they have done quite as well as those repotted in summer. 
This time, however, Be in general, ease at nnecessary, unless in the 
case of broken pots or other accidental circumstances, or in the 
ea yee it is quite iccais to shift heaths late in atu 
and I merely mention this to show that there is no danger to be 
aicesbendes from doing so at that time. I an aware that many 
say that ra ee should be shifted in spring, or early in summer, in 
order that the pots or tubs may be filled with roots before the 
even in autumn, when necessity requires it. 
