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MESSRS. J. B. LAWES, J. H. GILBERT, A ED M. T. MASTERS, 
the others it was on the plots manured with ammonia-salts that it contributed the 
largest proportion of the total miscellaneous herbage. On two ammonia plots in 1867 
it contributed nearly a fourth of the whole produce, and on several others a very large 
amount. But it yielded less where the combination of mineral manures with the 
ammonia-salts was such as to favour the luxuriance and maturation of the grasses. 
With nitrate of soda the produce of this plant was much less than with ammonia-salts, 
and especially when mineral manures were used in conjunction with the nitrate. 
It is obvious that the Rumex Acetosci is a gross feeder, and that it is favoured by 
ammonia-salts rather than by nitrate, but that it is restricted in development when 
the conditions of manuring are favourable to the luxuriant growth of the grasses. It 
has, disregarding some exceptions, yielded less to the produce in recent years than 
formerly. It continues to find its most favourable conditions on the ammonia plots, 
particularly when they are used in conjunction with minerals. It also exists to a 
large extent on the nitrate plots. Its most prominent associates among the grasses are 
—Festuca ovina, Dcictylis glomeratet, Poa trivialis , Holcus lanatus, Avena pubescens, 
A. jlavescens, and Bromus mollis. Among Leguminosse, its most conspicuous associate 
has been Lathyrus pratensis ; and among the Miscellaneae, Achillea Millefolium. 
It would seem that this objectionable weed is by no means so readily displaced by 
high manuring, and the competition consequent on it, as the Plantago and some others: 
for it flourishes under the influence of ammonia-salts, and it is only when these are 
associated with a liberal admixture of mineral constituents that the grasses seem to 
have the power of overcoming it 
Rumex crispus. —The curled Dock, like its congeners, has a thick, almost woody, 
root-stock, which descends into the ground, and, while thus securing a position and a 
hold, stores up nutriment and water in its tissues, which give it a great advantage in 
the battle of life. It is, however, not found in any quantity on the plots. It was 
observed on two plots in 1867, on two in 1872, and on two in 1877 ; but it was only 
once found in a sample, viz.: in that from plot 14, in 1877. 
Rumex obtusifolius has almost the same habit as the preceding, from which it differs 
mainly in the leaves. It was observed on one plot in 1867, on one in 1872, and on 
one in 1877, but was never found in any of the samples. 
Of the three species above mentioned, Rumex Acetosa is more especially a moist 
pasture plant, growing in association with other plants; while the Docks are more 
particularly plants of waste places, waysides, and arable land, growing in masses where 
other plants less robust in character do not find the conditions suitable for their 
well-doing. 
JuNOAOEAS. 
The species of this Order are distributed throughout the world, the true Bushes 
(Juncus) being found chiefly in wet, marshy places, and having relatively small 
development of their leaves ; while the Woodrushes ( Luzula ) generally occur in drier 
