996 General Notes. [ October, 
The pollen-tubes enter the style de/ween the bases of the papil- 
læ of the stigma, pass down in the strands of conducting tissue, 
and zot through the central canal, around which this tissue is 
arranged. The paper was followed by an account of the methods 
used, and illustrated by figures drawn upon a large chart. 
“Proof that Bacteria are the direct cause of the disease in 
corn-meal juice. After a few days some of the bacteria, which 
had increased rapidly in this medium, were transferred (a drop 
only) to another sterilized preparation of corn-meal juice. After 
a few days another transfer was made, and this was continued 
until the sixth culture had been reached, when there was pre- 
sumably but an infinitesimal amount of the original diseased juice 
present. Inoculations made with the bacteria of the last culture 
Saps in producing the blight as certainly and rapidly as in the 
- DrSt ca 
The EEL experiment was made by filtering a watery solution 
containing the bacteria, and then inoculating with the bacteria on 
the one hand and the filtration on the other, resulting in blight 
in the former and none at all in the latter case. 
“The mechanical injury to trees by cold,” by T. J. Burrill. 
There are two kinds of mechanical injury due to a low tempera- 
ture, viz: (1) The cracking and splitting of the bark and wood in 
a longitudinal-radial direction ; and (2) the separation of the con- 
centric layers of wood and bark, and especially the rupture of the 
cambium, thus destroying the bark and perhaps also killing the 
tree. 
The first injury is due to the shrinking of the tissues by cold. 
The second is due to the growth of ice-crystals in the annual 
rings or on the surface of the woo 
“Further observations on the adventitious inflorescence of Cus- 
cuta glomerata,” by Charles E. Bessey. A further examination 
shows that it is the universal rule in this species for the inflores- 
cence to develop from lateral adventitious buds, -and that no nor- 
mal inflorescence is developed. The adventitious inflorescence 
always bears a definite relation to the parasitic roots; that por- 
tion of the stem which bears roots produces adventitious inflores- 
cence, and the greater the number of roots the greater the mass 
of inflorescence. No adventitious Beet iy wae is produced upon 
any portion of the stem which does not bear ro 
The stem proper (main axis) all dies away a soon, not only 
ce en the inflorescences but in the masses of inflorescence 
ask The flowering stems soon establish direct structural rela- 
a tions Es the root, and thus with the host plant. Of other spe- _ 
cies examined, Cuscuta arvensis does not produce adven- 
Bons aa, while C. chlorocarpa and C. gronovii produce 
abundance of both the normal and the adventitious flower 
