240 Early Studies in Bacterial Plant Diseases 



sent him were dead — two destroyed by careless workmen, and one 

 had died of tiie disease, its death hastened by freezing during 

 the winter of 1891-1892. Scions of the last tree had been saved, 

 buds taken and inserted in healthy stock, and the disease had been 

 communicated. BurriU regarded this as of sufficient significance 

 to report. By 1893 Michigan, New York, Connecticut, Penn- 

 sylvania, Delaware, Maryland, Virginia, and California had passed 

 yellows legislation applicable to parts or the whole of each state. ^^ 

 Smith had continued his search for a parasite. But in 1893 the 

 most which Galloway could say " in his annual report was that 

 microscopic examinations of healthy and diseased tissues were 

 still being made. 



Other workers were finding difficulty in solving fundamentals 

 of their problems. Some experiments to determine the efficacy of 

 methods to prevent wheat rust ~° had proved disappointing. In 

 1894 M. A. Carleton of Kansas Agricultural College would be 

 placed in charge of cereal crop investigations, including rust and 

 smut diseases. January 30, 1893, Pierce confided to Smith: 



My work on the vine is not as satisfactory as I wish it could be. I find 

 it exceedingly hard to get down to it on account of the heavy load of other 

 work that I must do as I go along. There is hardly a day that I am not 

 called upon to work on some other disease — material coming to me from 

 all parts of the Pacific Coast. It is all work that should be done, but it 

 almost prevents me from working on my special subject. I have of late 

 found it necessary to add another room to my laboratory. I now have 4 

 rooms. An office, library and writing room combined facing the east; a 

 bed room back of the office ; a large room for a laboratory facing the west ; 

 and a room back of this for collections and a general storeroom. There is 

 a grate in the office, and the laboratory can be warmed with a gasoline 

 stove. This gives me east and west light and good rooms to work in. I 

 am getting a pretty solid hold in southern Calif[ornia}, and in fact all 

 along the coast, as is evinced by the letters of inquiry being received. 



Swingle and Webber at the Subtropical Laboratory at Eustis, 

 Florida, had not yet solved, of course, the difficult orange blight 

 problem, although each was finding working with citrus delightful. 

 Morphological and histological investigations were in progress. 

 They were studying the transpiration of healthy and diseased 



18 



1893 report, supra, 275. 

 " Idem. 



^"Additional experiments in the treatment of wheat rust, Report for 1893: 

 252-258. 



