

I 



• 



95 



Potatoes. — Several plots were used for experimental work on 

 the research carried out on Skin Spot. Trials also of seed-tutu* i> 

 affected with Sprain and Verticilliuin were also conducted. The 

 spontaneous outbreak of a considerable quantity of the last- 

 named disease in various parts of the ground provided copious 

 material for the commencement of research. 



Onions. — Extensive preparations were made for work on onion 

 diseases, especially Sclerotium cepivorum, but no general and 



uniform infection could be brought about. Observations were 

 therefore made in a neighbouring market-garden, where the 

 disease was abundant. 



Wheat. — A spontaneous outbreak of yellow rust {Puccinia 

 glumarum) on wheat sown for Frit Fly experiments is worthy 

 of record. 



The following papers were published during the year: — 



Diseases of Parsnips (A. D. Cotton), Kew Bull., 1918, p. 8. 

 The Microconidia of Botrytis cinerea (W. B. Brierley), Kew 



Bull., 1918, p. 129. 



Notes on Regeneration in Botrytis cinerea (W. B. Brierley), 

 Annals of Botany, Oct., 1918. 



On the Life History of the Rose Blotch Fungus (N. L. Alcock), 

 Kew Bull., 1918, p. 193, and some ten Board of Agriculture 

 leaflets were rewritten wholly or in part by Mr. A. J). Cotton. 



Presentations to the Library during 1918. — -War conditions 



are no doubt the cause of a marked decrease in the number of 

 additions made to the library during the year, whether by 

 purchase or presentation. Many of those received were published 

 some years ago. Several of the periodical or serial publications 

 presented bv the Bentham Trustees, altogether about thirty, an 

 or were published in Germany, Austria-Hungary, Russia, and 

 Belgium. Since 1914 none originating in the countries named 

 has reached Kew. The collection of drawings of orchids by 

 Lady Barkly, and of drawings of South African plants by Miss 

 E. B. Barkly, presented by the Bentham Trustees, has been 

 noticed in the Kew Bulletin, 1918, p. 342. 



Sir William T. Thiselton-Dyer has made several contributions 

 to the library. These include a copy of Collett's Flora Sim- 

 lensis, in which is inserted an original letter to Sir William 

 from the late Lord Koberts, giving some details of Sir Henry 

 Collett's military career; an interleaved copy of Sack's Text 

 Book of Botany, translated and annotated by A. W. Bennett ani 

 Sir William, containing MS. additions and various original 

 letters and published notes, and bound in four volumes with a 

 copv of the third German edition ; an interleaved copy of PritzePs 

 Thesaurus Literaturae Botanicae ; Whi taker* s Almanack from 

 1870-1917, 48 volumes, a complete set except for the absence of 

 the first issue; and several pamphlets, including the third part 

 of his work On some Ancient Plant-names, which appeared in 

 the Journal of Philology, vol. 



