29 
Mr. L. A. Boodle began an investigation on the hairs of certain 
Cruciferae, relating to the distribution of different types of hair, 
where more than one type is found in the same individual or species. 
Mr. Boodle also studied a remarkable insect-gall in an Indian grass, 
and made experiments on the extraction of rubber from tubers of 
Raphionacme utilis (Kew Bull., 1908, pp. 306-307), and continued 
some investigations on abnormal leaves of Pinus and other subjects : 
see above. 
Miss E. M. Delf began a study of the ovule, embryo-sac, &c., in 
some members of the Hlaeagnaceae and Lauraceae. 
Mr. W. E. Hiley, in collaboration with Mr. L. A. Boodle, spent 
a short time in completing the work begun in 1907 on the vascular 
anatomy of some species of Gileichenia. 
Mr. A. W. Hill carried out an investigation on the floral 
structure and biology of certain members of the Gentianaceae. 
Dr. A. A. Lawson continued his researches on the morphology 
of the Gymnosperms, in which he deals more especially with the 
gametophytes, fertilisation and embryo. iece of work on 
Pseudotsuga was completed, and Dr, Lawson also carried on a 
cytological investigation on one of the Liliaceae. 
Mr, A. J. Maslen investigated the structure of Pororylon Suteliffii, 
a fossil stem from the English Coal-Measures, in continuation of 
the observations already made by Dr. D. H. Scott. 
r. A. D. Waller, Mrs. A. D. Waller and Miss H. P. Kem 
carried out a research on the conduction of stimuli in plants, the 
transference of the stimuli being tested by electrical methods. 
Mr. W. C. Worsdell continued his work on Vegetable Teratology, 
and his investigations on the Vascular Anatomy of the Dicoty- 
ledons, and, in the latter subject, devoted his attention chiefly to 
the Ranales. Mr. Worsdell also made a special study of the 
rhizophores of Selaginedia with regard to the morphological nature 
of these organs: see above. 
present only in he conidial condition necessitates very careful 
examination to di tinguish between this and the conidial form of 
the European Gooseberry Mildew, as the two are frequently present 
on the same shet. Two diseases of potatoes not previously 
recorded in Britamr as epidemics, although known on the Continent 
and in Ireland, have been discovered on potatoes from Scotland and 
England sent to Kew for investigation, These are “ Corky Scab ” 
(Spongospora solani), and “ Dry Scab” (Spondylocladium atrovirens), 
Some field experiments bearing on the deterioration of potato 
tubers have been conducted during the past year, and will be 
continued next season. 
A statement appeared in The Agricultural Journal of the Cape of 
Good Hope, X X11. p. 152, that spraying with a solution of arsenite 
of soda killed dodder (Cuscuta) parasitic on alfalfa without in any 
way injuring the latter. Plots of alfalfa, red clover, and white 
