Last Work. Imnai. Honors 607 



By October 20 they were in Marseilles wliere, as at Montpellier, 

 they enjoyed the Lx^tanic garden. Before Smitli left Paris, he had 

 been told by Diifrenoy about the tumors to be found on Finns 

 hell e pen sis and Pinus strobus. Since 1913 he had been trying to 

 get suitable materials for a more or less complete study of pine 

 tumors. What materials he had received, however, had proven 

 old or otherwise unsatisfactory. He purposed now himself to 

 collect proper specimens and send them to his laboratory in 

 Washington. They visited Aries near Marseilles, then Nice, and, 

 among other points, Monte Carlo, where north into the mountains 

 near La Turbie, he, accompanied by a forest guard, climbed down 

 a steep and very rough mountain-side to a " straggling plantation 

 of Pin lis halepensis." ^'^ There he found an abundance of tumors 

 of all sizes and " collected tumors from 7 or 8 trees all living, 

 and all the younger ones up to % inch in diameter covered with 

 a smooth unbroken bark, the larger ones fissured." He saw none 

 on wood of the season's growth; and, inquiring as to other species, 

 he learned " there is a similar tumor on Pifiiis ceinbra in the high 

 mountains back from the coast, but none ... on Pinus maritiina 

 which grows on the moutains near P. halepensis. . . . Strange," 

 he said, " that this species should be wholly immune! I wonder 

 if it is." He remembered having seen one tree of Pinus maritijua 

 where they collected the tumors. So he mailed six of the pine 

 tumors to Miss Brown of his laboratory and planned to send 

 other specimens later from Florence, Italy, evidently after he had 

 consulted with Dr. Petri of the School of Forestry in the Cascine 

 there. 



Dr. and Mrs. Smith spent one day at Genoa and, soon after 

 arriving at Florence, he learned at the botanic garden where Dr. 

 Petri could be located. Finding him, he discovered that he recently 

 had published 



a well illustrated paper on the pine tumor from material obtained near the 

 sea between Leghorn and Quercianella and in the latter place. He [had] 

 isolated and described a yellow organism, a polar flai^cllate gram positive 

 organism, as the cause of the tumor, but he [had] not reproduced the 

 disease by his pure culture inoculations. He [thoucht] the disease is intro- 

 duced into the pine by aphides, Eulachnus agilis (Kalt.) Del Guercio. 



Smith read his paper, next day examined his " interesting slides," 



«' Journal, Oct. 22-24, 1924. 



