cil | Proceedings of the Asiatic Society of Bengal. [N.S., XV, 
plant. The rer of leaves also is much higher. It is also 
shown that starch, cose, filter paper, straw and sawdust affect the 
nitrification of oil- ne haan ammonium sulphate. 
The experimental oe of Oryza sativa var. plena, 
ares y B. K. Bur 
To all outward appearances, oa sativa, var. plena, Prain, or the 
double spies pedaly of Bengal, looks like an ordinary Hest But it has 
this pee that nearly every spikelet contains two to five ovaries 
instead of one, the number of well-developed grains ‘tee icin only one 
or 
At Alibag, in a plot of about 100 plants of an ordinary variety of 
rice, called Morchuka, the writer found this year that in 8 or 10 
endenc 
a 
flowering glumes and pales and sometimes ovaries also, these spikelets 
bed 
ing often sterile or one grained, though rarely they may produce two 
ains also. The additional glumes and nies: have a tendency to be 
cut up, variously transformed, or so aoies reduced. It has been sug- 
g is sport might be beginning of t volution of the 
double grain pi - Specimens showing the abnormalit different 
stag been collected an o illustrate - r 
wane to collect seeds of the strongly Sportive plants and to grow 
a 
al generations from them to see if by selecting from them the sug- 
withedl expectation will be realized. 
Notes on the ring fume of potato.--By S. D. Nacpur- 
KaR and H. H. Man 
Ring of potato is a bacteria st which is the seymne enemy 
of potato salikeabiaes on the Deccan. The experiments w ied out 
at means the crop c ould be preg A nd ehsiods: of tl these was 
the dominant cause of the perpetuation of the ase in the fiel 
The experiments recorded confirm previous gerard as to = convey- 
f t i i otato from crop to cro th: through the 
and the soil. They show the extremely infectious character of the disease 
in that not onl e seed, also every thing whi been in conta 
ith it, even t ife by which affected sets h s capable of 
conveying the disease to a healthy tuber and hence to a healthy plant 
tion does Owever, appear to live in the soil in a 
virulen ition to affect new — 
was uce 
After five to six and a half months the ‘ioe ae sae of. the soil io new 
It d i 
potato plants had disappea wo us appear that if land is kept 
ee from pot lants, or other plants capable of carrying th , 
for six months the danger of infection through the soil is very small 
six months or more is usually allowed to elapse between cro th 
land in the Deccan it would a appear that the danger of infection — 
the soil under Saas conditions is small, if the diseased plants are care- 
fully removed during the growth of each crop. This agrees wi ith ieee ractical 
experience and enables attention to be focussed on the provision of disease- 
free seed as the main line of attack on this very fatal disease. 
Methods of planting oe and position of seed in 
ground.—By M. L. KuiKarnt. 
Results of experiments of the si single-eye method of planting sugar- 
‘Cane sets, with the eye planted upwards, are given in the present paper, 
promised las d these figur i 
6-8) 
defects are also shown, and further e experiments with alterations to re- 
