idJb MESSRS. J. B. LAWES, J. R. GILBERT, ARt) M. T. MASTERS, 
the second, however, they had each declined considerably, whilst on both, but especially 
with the nitrate of potass, Holcus lanatus had very considerably gained ground. 
These three grasses were also among the most prominent on plot 16. On that plot, 
however, Alopecurus had become very characteristic; whilst on plots 19 and 20 it did, 
it is true, increase very considerably from the first to the second separation-year, but 
still yielded a much less proportion than on plot 16. The other grasses of chief promi¬ 
nence on plot 16 were Avena Jlavescens, Poa trivialis, and, in a less degree, Dactylis 
glomerata and Loliam perenne. Of these, Avena Jlavescens, Poa trivialis, and Dactylis 
glornerata, had each increased on plots 19 and 20, but neither had acquired the same 
prominence as on plot 16. In the later years, however, the notes indicated that, as on 
plot 16, Avena Jlavescens became more prominent on both plots; whilst Lolium perenne 
decreased on 19 with the nitrate of soda, but increased on 20 with the nitrate of 
potass. Anthoxanthum odoratum was much the higher on both the newer experi¬ 
mental plots, but on both it declined very much from the one separation-year to the 
other. Avena pubescens was meagrely, but about equally and increasingly represented 
on the three plots; whilst the poor Cynosurus cristatus, a poor-land grass, was more 
prominent on the two plots the most recently reclaimed from the unmanured condition. 
According to the figures in the table, Leguminosse considerably increased on both 
plots 19 and 20 from the first to the second separation-year ; but much more on plot 19 
with nitrate of soda than on plot 20 with nitrate of potass, and this relative excess on 
plot 19 continued, as is shown by the partial separations of later years. As in other 
cases of increase of Leguminosse under the influence of a potass manure, Lathyrus 
pratensis is by far the most prominent constituent. As already intimated, however, 
the later partial separations further show that the Leguminosse have considerably 
declined on plot 16, and are now more prominent on both 19 and 20, and more so 
again on 19 with the nitrate of soda, than on 20 with the nitrate of potass. According 
to the complete separations, Lathyrus pratensis is seen to be the most prominent 
leguminous species on all three plots, so far as final weight is concerned ; but according 
to the notes taken on the ground during growth, Trijolium, pratense or T. repens 
showed considerable prominence on the two newer plots; T. pratense being the more 
prominent with the more rapidly distributing nitrate of soda; and T. repens the more 
so with the probably more superficially retained, and less deeply distributing, nitrate 
of potass. The greater prominence of the Lathyrus in the samples is no doubt partly 
accounted for by the fact that a larger proportion of its produce would be included in 
the crop as mown, whereas a considerable proportion of the Trifoliums would be left 
uncut. At any rate, it is clear that Leguminosse are favoured on all three plots; and 
it would seem more so with the nitrate of soda and sulphate of potass than with the 
nitrate of potass. Whether the decline on all three in the later years (subsequent to 
the last complete separation), but the more on the plot which has been the longer 
under treatment, be due to an exhaustion of the plants, and to the increased com¬ 
petition with the grasses, under the influence of the manure, and especially of the 
