642 Third European Journey 



display. Among those who arrived were "' the Dutch cancer 

 specialists, DeVries and Deelman. They spent about three hours 

 looking over crown gall material, specimens and slides." ^^^ 



On October 1 he applied for an additional $40,000 research 

 appropriation for his laboratory during the approaching year. For 

 the crown gall work he listed four problems which he purposed 

 to have studied: 



1. Can tumors be produced in cold-blooded animals with Bacterium 

 tumefac/ens? ... 2. Can the process of tumor formation be observed 

 under the microscope by introduction of Bacterium tmnejaciens into a 

 single cell by means of Chambers' apparatus? 3. Can the strains of the 

 crowngall organism we now possess be gradually adapted to growth at 

 blood temperature and thereby made to produce tumors in rats and mice? 

 Can strains of Bacterium tumejaciens be found in nature which naturally 

 grow at 38°C., at temperature of man's blood? 



The appropriation was to be divided equally between four 

 branches of investigation: crown gall; bacterial soft rots of 

 potatoes, field and laboratory studies; bacterial diseases of wheat 

 in the middle west beyond the Mississippi River, field and labora- 

 tory studies; and bacterial diseases of beans and related legumes, 

 and bacterial diseases of tobacco, field and laboratory studies from 

 Massachusetts to Florida."'" 



In March, Dr. B. M. Duggar, chairman of the executive com- 

 mittee of the fourth International Botanical Congress, had called 

 on Smith and told him that he had been selected to givt one of 

 two main addresses for the sessions of the congress meeting as a 

 whole. " This is a great honor," he replied. " I am hardly equal 

 to it or worthy of it." "^ Dr. Went was the European chosen to 

 speak on the evening of August 18 and Dr. Smith's address was 

 scheduled for August 20. He took for his topic, " Fifty Years of 

 Pathology," and, during its preparation, he found that to sum- 

 marize a half-century of pathology and " make it interesting 

 [was] no easy task." ^^"^ More than once, while writing, re-writing, 

 and condensing his address, he was unsure that he would succeed. 

 The International Congress of Plant Sciences, as the congress 

 became known, was held at Cornell University during the week of 



^" Diary, Sept. 28, 29, 1926. 



^'"' Letter addressed to Dr. W. A. Taylor, chief of the Bureau of Plant Industry. 



'" Diary, Mar. 29, 1926. 



^"^ Diary, Aug. 5, 1926. 



