PREFACE. "Et 
with hills, plains, vallies, &c. I would 
about the month of July, when most 
grasses are in flower, perambulate that 
farm. I would take a view of the 
moist meadows or low grounds, and 
note down those grasses which ap- 
peared most luxuriant. Where I found 
any material difference in such situa- 
tions, I would naturally conclude there 
must be a change in soil: I would 
therefore examine the soil in the dif. 
ferent places, according to the luxu- 
riance of the grasses. The declivities 
and their different aspects, on the 
summits and on the levels, in each 
part of the farm, I would also exa- 
mine; for, according to observations I 
have made in the Botanic gardens, 
and elsewhere, I find a material dif- 
ference between the luxuriance of many 
plants, from their not growing in the 
same situations. ‘These remarks I would 
sum up, and from them conclude 
which were the most beneficial grasses, 
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