588 Third European Journey 



oxidation determinations, as bases for comparative study of normal 

 and diseased tissue juice from various plants. That he gave fully 

 one-half of his working hours to this type of research in his 

 laboratory, especially as the work began to elaborate growth 

 accelerating and growth inhibiting formulas for the study of bac- 

 terial organisms, indicates his interest and belief in its possibilities. 

 After his cancer research association address, within less than 

 two months, he had completed 325 experiments, and several more 

 series, including some on Bryophyllum and Ricinus, were planned. 



But this work was but one department of his laboratory. Many 

 papers on other subjects had been, or were being, completed by 

 his co-workers. November 6, 1923, Miss Bryan was working on 

 a paper on a disease of delphinium; Miss Brown, on a paper on 

 limb knot of apple; Miss McCulloch, a paper on a spot disease 

 of gladiolus; Miss Fawcett, one on B. tracheiphilus in media 

 curves of growth; Dr. Braun, one on pythium disease of Pelar- 

 gonium; Miss Elliott, on a paper with Smith on Bacterium andro- 

 pogom and another paper by herself on several cereal spots; 

 Miss Hedges, a paper on bean wilt, and from 1922 to 1926 she 

 discovered and described a new and destructive bean disease 

 caused by Bacterium flaccumfaciens; Dr. Rand and Miss Cash, a 

 paper on Stewart's disease of maize transmitted by Diabrotica 

 duodecempunctata\ Dr. McKenney, a paper on field treatment of 

 soil for Bacterium solanacearum; and Miss Quirk, with Smith, a 

 paper on hydrogen-ion concentration of crown gall fluids versus 

 normal juice of sugar beet and sunflower. In 1923 Miss Quirk 

 and Miss Fawcett, with Dr. Smith's aid, had published studies on 

 the hydrogen-ion concentration of culture media as compared with 

 Fuller scale readings. In this had been elaborated " the approxi- 

 mate ranges of growth (acid-alkaline)" of more than two dozen 

 bacteria pathogenic to plants. An abundant, steady increase in 

 learning about plant bacteria and bacterial diseases of plants was 

 being published from this laboratory. 



Late in the year 1922 and early in 1923 the first centennial of 

 Pasteur's birth had been celebrated; and in at least two com- 

 memorative events in this country Dr. Smith had participated. 

 At a celebration held at Rutgers College on December 20, 1922, 

 he had spoken on " Pasteur — the man," ^^ and on January 10, 



""Scientific Monthly 16(3): 269-279, March 1923. 



