44 
CORN. 
have the key to the attack; hut, as we have no notes of Oat-grains 
being galled like those of Wheat, it does not seem likely that we shall 
find the attack comes from inside the grain. 
On looking over the observations we find that the “ Tulip-root ” 
disease has been found to occur to Oats after Turnips, Potatoes, and 
Beans, also on land broken up after Hay, and it is specially noted in 
one instance that the part of the field which had previously been in 
Oats was the worst attacked by “Tulip-root” in the successive 
Oat crop. 
The above observations point at least to probability of the Eel- 
worms remaining in the ground, or being brought on to it in infested 
straw; but we need details and further observations. 
It will be observed that lime, nitrate of soda, soot, and salt have 
not proved of use in warding off attack. 
In any further observations with which I maybe favoured, I should 
be particularly glad to know whether the attack has been limited (as 
in that of which the plan is given at Arniston Mains) to any particular 
part of the field; and also to have details of previous crops and 
manures for the preceding five years, this being the length of time to 
which it has been proved that the life of one kind at least of the 
common crop Eelworms may be extended. 
In the above report it will be noticed that I have limited myself 
almost entirely to observations on the diseased crops, as I had not 
then the very high microscopic powers needed for any trustworthy 
examination of such excessively small bodies as these Eelworms. I 
could clearly distinguish that the egg was of the shape figured at p. 48, 
also that the largest-sized Eelworms were furnished with a spear, but 
whether this had a trilobed base, or, in fact, any swollen base at all 
(see figs, and description, pp. 36 and 37), I had not then means of 
observing. Now I have procured these, and shall be very glad of any 
specimens with which I may be favoured, either of Tulip-rooted Oats 
or of “ going off” Clover. From my own observations of injury and 
from information now received, I think it very likely that a searching 
examination of diseased Clover might show Eel worm-presence of the 
same kind as the “ Tulip-root ” Eelworm, and infectious from one 
plant to the other. 
But further from the great difficulty of procuring any reliable 
information in England as to the nature and treatment of the “ Tulip- 
root ’ attack to Oats, or the precise species of Eelworm which causes 
it, I ventured, whilst the previous pages were going through the press, 
to apply to Dr. J. G. de Man, Conservator of the Museum, Leyden, 
now resident at Middleburg, in the Netherlands, well known for his 
researches regarding the AnyuillulidcB, and beg to acknowledge with 
