84 PKEL1MLNARY REPORT ON COAL-TESTING PLANT, [bull. 261 
PERSONNEL. 
The coal tests under steam boilers were all made under the direc 
supervision of Prof. D. T. Randall, of the Department of Mechanica 
Engineering- at the University of Illinois. He was assisted by Messrs 
J. J. Harman, H. B. Dirks, R. H. Kuss, H. Kreisinger, C. H. McClure 
R. W. Rutt, C. H. Green, R. H. Post, and H. W. Weeks, the first thre 
being replaced by the last three on September 1. Mr. Henry Aren 
was fireman for all the trials, and his work was intelligent and satis 
factory. Mr. William Cameron fired the auxiliary boiler. The engiu 
was under the charge of Mr. Otto Kinner, who was assisted by Mr 
H. M. Horstmeier, oiler. The electrical apparatus was in charge o 
Mr. Jos. Underwood, who was assisted by Mr. A. P. Bridgeman, h 
charge of the switchboard. 
The work of all the corps of observers was performed with an intel 
ligcnt realization of the importance of the work and with painstaking 
accuracy. 
