Last Work. Tinai. Honors 601 



you approve it?' He said, 'yes.'" Smith explained, "'This is 

 the only year I could go, for one of my assistants is on leave of 

 absence, and next year I shall [be] hard up again." He said 

 ' yes. Go this year.' " Smith was very happy. He had " met the 

 Secretary only a few times and in no way [had] tried to ' cultivate ' 

 him. I like him, however," he wrote, " and, evidently, he likes 

 me." Immediately beginning to prepare for his journey, he booked 

 passage for the steamship George Washington, of the United 

 States Line. He gathered together his notes made during the 

 summer from his potentiometer work, and arranged to take more 

 than one hundred mounted photographs illustrating his crown 

 gall studies. On-^eptember 3, Dr. and Mrs. Smith left for Europe. 



On the day of their departure, he wrote further: " It has been 

 a great wrench to pull loose. . . . However, the summer's experi- 

 ments are pretty well over and the autumn ones I had planned 

 must wait." He planned to " make some further experiments on 

 Ricinus with monobasic ammonium phosphate for tumors in young 

 stems." When he returned, he inoculated Ricinus plants with 

 ammonium formate, ammonium lactate, and ammonium carbo- 

 nate." These experiments were started early in the summer of 

 1925 and by October, " Each one [had] given proliferations, but 

 in most cases not very extensive ones." 



Dr. Smith kept a journal of his journey, and he purposed, while 

 in Europe, to write up the " potentiometer crown-gall studies " 

 of the past tw^o years. He had also planned to " complete a paper 

 on proliferations in Bryophyllum," to " do one more on Begonia 

 phyllomaniaca proliferation," to " complete a paper on night and 

 day variations in pH of leaves of sunflower," and to prepare with 

 various of laboratory co-workers papers on Begonia lucerna, on 

 a bacterial disease of sorghum and broom corn, on the Puerto 

 Rico bacterial disease of sugar cane, on tuberculosis of sugar beet 

 {^Bacterium heticolimi) and, among other things, he had not 

 forgotten the final revision of some chapters of the fourth volume 

 of Bacteria in Relation to Plant Diseases and the experiments with 

 Chambers' improved form of Barber's apparatus " to produce 

 crown galls in single cells and see them grow in nutrient solutions 

 under the microscope." But each of these tasks would have to 

 await his return. 



'*' Diary, June 20, July 3, Oct. 26, indicating ammonium carbamide a type used. 



