Report on the Field and Feedinj Eeperimcnts at Woburn. 337 
enemies, than seeds which grew quickly. The results he ob- 
tained will be more manifest by one or two illustrations. The 
average of six experiments with cauliflower-seeds two years old 
gave eighty-seven per cent, for germination, and fifty-four per 
cent, for vegetation ; thirteen experiments with three-year-old 
mustard-seed gave an average of eighty-nine per cent, for ger- 
mination, and sixty per cent, for vegetation ; and six experi- 
ments with three-year-old mustard-seed gave an average of 
ninety per cent, for germination, and seventy-four per cent, for 
vegetation. 
These experiments make perfectly plain what was obvious 
theoretically, that a certain deduction must be made from the 
germinating power in estimating the actual number of plants 
which will be produced in the field. And the deduction must 
be greater in small seeds, ;_like the meadow grasses (^Poa) and 
florin (^Agrostis), and in imperfectly ripened seeds like those of 
meadow foxtail (Alopemirus) and yellow oat-grass (Avena). 
I have contributed a paper on some adulterations in grass- 
seeds to the last number of the ' Journal.' The paper pre- 
viously published in the ' Journal ' on wheat-mildew has been 
reprinted by the Indian Government, and extensively circulated 
among the wheat-growers in India. Correspondence in con- 
nection with the diseases of wheat in India, and arising out of 
the distribution of this paper, has been sent to me from the 
India Office. I have supplied suggestions for further inquiries, 
which may lead to important results connected with the agri- 
culture of India. 
XI. — Report on the Field and Feeding Experiments at Wohurn, 
conducted on behalf of the Royal Agricultural Society of England 
during the year 1883. By Dr. AUGUSTUS Voelcker, F.R.S., 
Consulting Chemist to the Society. 
The means adopted last year to keep the land on which wheat 
and barley are grown continuously free from weeds were again 
found necessary to be employed, and resulted, as then, in the 
land being kept perfectly clean, and in good condition. 
Experiments on the Continuous Growth of Wheat. 
On August 29th, the permanent wheat-land was ploughed for 
the first time, and twitched and ploughed a second time on 
October 13th. Nine pecks of Browick wheat, the variety and 
quantity used in previous years, were dibbled and harrowed in 
on October 19th. 
VOL. XX.-^S. S. Z 
