31 
Mr. C. K. Bancroft made a study of the life-history of 
Cladosporium herbarum, and investigated the brown spot disease 
of tomato and a disease of cacao caused by Colletotrichum 
Cradwickit. 
Prof. F. de las Barras made some cultural experiments on the 
germination of Fern-spores 
Mr. L. A. Boodle studied the anatomy of some species of 
Nectaropetalum and other Dicotyledonous genera in relation to 
their affinities, and investigated a case of canker-like growths on 
the stem of a species of Ribes, and ale continued some experiments 
with Cruciferous seedlings: see a 
r. J. Fraser, on behalf of ford ae was engaged in an 
extended study of the pollen of various plan 
P. Georgevitch finished a scieach 6 n the conditions of 
eriwreti ofa species of Bacterium from a ‘eben spring, and began 
Thee of certain cases of apospory and ap 
Dr. M. Greshoff (the late) carried out a ‘Huis examination of 
a large number of plants: see above. - 
Prof. P. Groom made “i relating to the transpiration 
ga the rate of ascent of water in trees. 
Dr. G. van Iterson (Junr.) ares a research on laticiferous tissue 
and on the formation of resin and gum in plants. 
Mr. A. J. Maslen continued his work on the anatomy of 
Mesoxylon (Poroxylon) Sutclifii, a fossil plant from the Coal- 
easures, 
r. T. G. B. Osborn studied the me Ee mm of Podocarpus 
and Darien, and the mycorrhiza contained in them. 
Dr. D. H. Scott studied some fossil plants of Devonian age. 
Miss E. L. Stephens made some observations on an apogamous 
species of Pteris. 
L. AaB: 
Pathology.—The number of reports issued during 1909 exceeded 
in number those issued during any previous year. Amongst 
diseases of potatoes a noticeable feature was the great extension of 
“Corky Scab,” caused by Spongospora solani. On the other hand, 
* Dry Scab” due to plane peng a er: which was recorded 
during 1908, was not received at ring the past season. A 
series of experiments on the “groaning of potatoes were con- 
ducted, and the rewilts paplaeud in the j ournal of the Board of 
Agriculture, vol. xvi., p. 177, with plate. A considerable amount 
of time has been devoted to investigating the algae and fungi 
occurring in sewage and contaminated river-water, on behalf of the 
Royal Codieaes sion on sewage disposal. An investigation of 
the fungi causing discoloured spots eg cb beef from Argentina, 
has also been in hand during the past 
A considerable amount of diseased cecesial from the colonies and 
outside sources has been submitted to Kew during the past year, 
including Diplodia cacaoicola, Henn., the cause of a disease which 
is a source of serious damage to Cacao in the West Indies. This 
disease is also prevalent in the Island of St. Thomé, whence 
material has been submitted to Kew for examination by the 
representative of the Portuguese Government. “— 
