82 Botany in the Experiment Station. 



these devices perhaps is that for photographing cultures of fungi 

 and bacteria by transmitted Hght and for which the Botanist was 

 awarded a diploma and given a gold medal at the Universal Expo- 

 sition at St Louis in 1904, 



The diseases of plants investigated, the results of which have 

 been published in bulletins, are as follows: A new Anthracnose of 

 the Privet, and the Cercospora of Celery Blight, both in bulletin No. 

 49, December 1892. After the article on the anthracnose of the 

 privet was published the perfect stage, or ascus stage, appeared in 

 the cultures. This was the first discovery by exact methods of the 

 connection of an ascus stage with one of the anthracnoses*. In 

 Bulletin No. 61, December, 1893, were published two sundry articles 

 on plant diseases caused by fungi, Artificial Cultures of Melanconium 

 fuligineumznd Powdery mildews of Crucifers. An extended study 

 of Carnation diseases was also made, but the results were published 

 in the American Florist, 1893. 



In 1894 an extended investigation was made of the fungi which 

 cause leaf curl and plum pockets. This was a morphological, struc- 

 tural, and taxonomic study, and included illustrations by photo- 

 graphs, microscopic structure and descriptions of the species then 

 known to occur on the genus Prunus in the United States. It was 

 published as Bulletin No. "/t,, September, 1894. 



The question of the damping ofif of seedlings was investigated 

 during the same and following year. The results of this investiga- 

 tion were published in Bulletin 94, May, 1895. ^^ included a study 

 of development and parasitism of Pythium- debaryanum on seed- 

 lings. Pythium intermedium on fern prothalHa, and Completoria 

 complens, the rare member of the Entomophthorales on fern pro- 

 thalHa which was here noted for the first time in America. A new 

 cutting bed fungus (VoluteJIa leucotricha) was described, and some 

 notes were published on a sterile damping oflf fungus (Rhisocfonia) 

 and it was shown here, as the writer has shown formerly,! that a 

 large percentage of damping off of seedlings which previously had 

 been attributed to Pythium debaryanum was caused by this fungus. 



For the past year and at the present time investigations are being 

 made into the life history of the pear and quince leaf spot (Ev.toiuo- 



*See Bot. Gaz., 26, loi, 1898. 



ffSome diseases of Cotton, Bull. 41, Ala. Apfr. Exp. Sta., Dec. 1802. Dis- 

 eases of Cotton, in the Cotton Plant, Bull. 33, U. S. Dept. Agr. Office Ex- 

 periment Station, 292, 1896. 



