Report of the Cryptogamic Botanist and 



Plant Pathologist. 



Wlien entering upon tiie duties of cryptogamic botanist to th.e 

 station it seemed advisable in tbe study of plant pathology to 

 provide a small culture chamber where the handling of culture 

 medi and the manipulation of the cultures of bactei'ia and fungi 

 asisiociaited with plant diseases, could be carried on with little 

 danger of contamination fi'om the numerous floating particles of 

 a general working-room. Accordingly, a small, tight-glass com- 

 partment was fitted up in one corner of the laboratory. This com- 

 partment is about ten feet high, and covers six to ten feet square 

 of the floor space, and a few coils of steam pipe were fitted to 

 supply the necessary general warmth in cold weather. The com- 

 partment is supplied with a table for the manipulaitions and for 

 microscopic use. The wall surface on one side is provided with 

 shelves for storing the cultures. Against the wall there is also 

 a Eohrbecks oA^al thermostat, No. 107, large size, fitted with Lau- 

 tenschlagers^ electric thermoregulator. All other' bacteriological 

 apparatus, as steam sterilizer, dry oven, etc., is kept outside the 

 general laboratory. At the present time there are several hun- 

 dred cultures going on in this culture chamber, and it serves the 

 purpose admirably. 



Of the investigations undertaken since September, 1892, there 

 have been prepared for the general bulletin, two articles, "A new 

 Anthracnose of the Privet " and a " Note on the Cercospora of 

 Celery Blight." Another more extended study will soon be cora- 

 plet/ed and ready for publications on a new tomato disease, and 

 good progress has been made upon a study of "Winter Blight of 

 Tomatoes," " Some New Carnation Diseases," and 'T)amping Off." 

 For some time past an organism has been under culture and study, 

 obtained from the tubercles of Vicia satlva, which promises to 



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