418 The Woburn Pot-Culture Experiments , 1913. 
it attracted much attention. At the same time, this, as is 
always the case, affected the plants very much and prevented 
their subsequent satisfactory development, so that too much 
weight must not be attached to the quantitative results obtained. 
These, however, with this reserve, are set out in Table III. 
Plate 7 shows the growing crops, and Plate 8 the roots of the 
corresponding plants. 
1 able III. The addition of Lime to soil rich in Maqnesid 
1913. 
No. of 
ears 
No. of 
grains 
Weight of 
Corn 
Straw 
No treatment ...... 
Lime added, to 2 -5 per cent. 
n ii i > 3 0 ,, ... 
ii ii n 3*5 ,, . ... 
n 'i a 4'0 ,, ... 
a a n t‘5 ., ... 
7 
7 
7 
12 
23 
23 
158 
244 
242 
371 
703 
463* 
Grammes 
4-07 
9-95 
10-12 
14 55 
27-27 
25*15 
Grammes 
1342 
18-52 
20-12 
29*85 
53*45 
53*47 
into the wired Inclosur^ ° Ut ° f 6 68X8 ° f tMs SGt by a sparrow which found its way 
It will be noticed that the applications of lime in each case 
gave a marked increase both in corn and in straw ns compared 
with the untreated set, the increase being the greater as more 
lime was applied. 
The heaviest application (4*5 per cent.) of lime which 
as stated, gave a comparatively low result in 1912, would, but 
loi biid depredation, have probably given the highest return. 
It is reasonable, therefore, to suppose that the lesser produce 
in 1912 was the result of the application of a considerable 
quantity of lime in the caustic state. By 1913 the lime, 
however, would have become carbonated, and accordingly no 
longer produced any harmful effect. 
The lime-treated sets were marked by their darker foliage, 
the better tillering, and greater length of straw and ear. 
In the case of the application of 4 per cent, of lime there 
were as many as twenty-three shoots from the six plants 
originally left, as against seven shoots only in the untreated 
set from the same number of plants. 
It is quite clear from this experiment that the addition of 
lime to a soil in which magnesia originally is in excess of the 
lime, will be attended with much benefit, and that no harm, 
but rather benefit, will result from the presence of lime in 
excess ; whereas from previous experiments it has been shown 
