156 BOTANICAL GAZETTE [AUGUST 
Herbert J. Webber, physiologist, in charge of laboratory of plant breeding ; 
Newton B. Pierce, pathologist, in charge of Pacific coast laboratory; Her- 
mann von Schrenk, special agent, in charge of Mississippi valley laboratory; 
Peter H. Rolfs, pathologist, in charge of tropical laboratory; Merton B. 
Waite, assistant pathologist, diseases of orchard fruits; Mark Alfred Carle- 
ton, cerealist ; C. O. Townsend, pathologist ; George T. Moore, physiologist ; 
M. Duggar, physiologist; Rodney H. True, physiologist; William A. 
Orton, assistant pathologist; Joseph H. Chamberlain, expert in physiological 
chemistry; Thomas H. Kearney, assistant physiologist ; Cornelius F. Shear 
assistant pathologist ; Flora W. Patterson, mycologist. 
The botanical investigations and experiments are conducted by the fol- 
lowing sinkee , ook, botanist, in charge of tropical agriculture; A. J. 
Pieters, botanist, in eee of seed testing laboratory; V. K. Chestnut, botan- 
ist, in charge of investigations of poisonous weeds; Lyster F. Dewey, assis- 
tant botanist ; Carl S. Schofield, expert on cereals. 
he following have charge of the grass and forage plant investigations : 
A. S. Hitchcock, assistant agrostologist, in charge of field work ; David Grif- 
fiths, assistant agrostologist, in charge of field management ; Elmer D. Mer- 
rill, assistant agrostologist, in charge of collections; C. R. Ball, assistant 
agrostologist. 
The officers of the pomological investigations are: William A. Taylor, 
pomologist, in charge of field investigations; H. P. Gould, pomologist, in 
charge of fruit district investigations ; George C. Husmann, expert, in charge 
of grape investigations. 
The following branches are conducted under the direction of the chief 
of the bureau, but the officers directly in charge are given under each branch: 
Experimental Gardens and Grounds: L. C. Corbett, puesrres E. M. 
Byrnes, head gardener; George W. Oliver, expert plant propagat 
Congressional Seed Distribution: Robert J. Whittleton, «penned 
of weighing and mailing section ; James Morrison, superintendent of records. 
Seed and Plant jatroduction: Ernst A. Bessey, assistant in charge; 
David G, Fairchild, permanent agricultural explorer. 
Arlington Experimental Farm: L. C. Corbett, horticulturist, in charge. 
Tea Culture Experiments: Dr. Charles U. Shepard, in charge. 
