Florida and Cv\i ifornia Laboratories 251 



symptoms were made of the new disease known as " little peacli." 

 At his liome at Huhbardston he continued his study of the bac- 

 terial disease of cucumbers, cantaloupes, .nid squashes on wliich 

 he had read a paper belore the recent botanical congress at 

 Madison. On September 3 lie wrote Galloway: 



The cucumber blight is here in plenty on my father's squashes and I am 

 learning all I can about it. Tlic squashes are much more resistant than the 

 cucumbers and melons and hold out for several weeks — one of the 

 symptoms reminds one of the oranije blight, viz. the development of an 

 enormous number of flower buds on short branches. In a few cases the 

 vines seem to have partly recovered, having sent out very leafy side branches 

 which attain remind*? one of the orant^e blight. 



He had been ordered to Michigan both times from Chicago' 

 where, at the World's Fair, he was one of several workers who 

 at various times had charge of the Division's exhibit on plant 

 diseases and their treatment. The farmers and fruit growers 

 showed a " lively interest in the problems [the Division was] 

 studying," '^ particularly in fungicidal treatments for disease-pre- 

 vention. So worn became the plates of " sprayed and unsprayed 

 pears " ''■ that new plates or additional specimens of pear varieties 

 had to be sent for; and to this v/as added a request for demon- 

 stration materials of " sprayed and unsprayed " grapes. Smith 

 wrote a special memorandum on potato disease treatments. This 

 read: 



Within the last two years a distinct advance has been made in this 

 country in economic phytopathology by the discovery of methods for pre- 

 venting two widespread and destructive potato diseases — the blight and the 

 scab, both due to fungi. This was strikingly illustrated by two exhibits in 

 the united experiment stations' exhibit at the World's fair. Mr. L. R. 

 Jones of the Vermont station, who dealt with the blight, exhibited photo- 

 graphs of sprayed and unsprayed parts of fields, the vines covering the 

 ground [where] sprayfed] and almost totally destroyed [where not 

 sprayed]. Photos of the yield of tubers on sprayed and unsprayed parts 

 showed equally gratifying results. . . . The results were obtained by the 

 use of copper fungicides. 



The other exhibit was from Professor H. L. BoUey of the North 

 Dakota experiment station and had to do with a remedy which 

 Smith described and of v/hich he wrote later: ''' " Bolley showed 



" Letter, Smith to Galloway, September 18, 1893. 

 *^ Letter, Smith to Galloway, September 25, 1893. 

 ** Plant pathology: a retrospect and prospect, op. cit., 608. 



