March 1S92. 



PSYCHE. 



227 



doubtful. Stated in another form 75.6 

 per cent of the experiments have been 

 successful ; 13.4 per cent unsuccessful ; 

 and 1 1 per cent doubtful. These 

 field experiments have been dis- 

 tributed among the various States as 

 follows: Kansas, 1,222, (successful, 

 953, unsuccessful, 140, doubtful, 129) ; 

 Illinois, 40, (successful, 17, unsuccess- 

 ful, 15, doubtful, S) ; Texas, 26, (suc- 

 cessful, 13, unsuccessful, 6, doubtful, 

 7) ; Wisconsin, 29, (successful, 13, un- 

 successful, 13, doubtful, 3) ; Oklahoma 

 Territory, 26, (successful, 20, unsuc- 

 cessful, 4, doubtful, 2) ; Missouri, 13, 

 (successful, 11, unsuccessful, 2) ; Iowa, 

 15, (successful, 9, unsuccessful, 5, 

 doubtful, 1) ; Minnesota, 8, (successful, 

 3, unsuccessful, 2, doubtful, 3) ; Indian 

 Territory, 2, (successful, 2) ; Nebraska, 

 6, (successful, 6) ; Indiana, 1, (success- 

 ful) ; Arkansas, 1, (successful); Miss- 

 issippi, 1, (successful). 



In order to assure myself of the actual 

 condition of the experiments in the field, 

 I have personally visited a large num- 

 ber of fields during the past season 

 while the experiments were being pei'- 

 formed, and have kept a field agent con- 

 stantly in the field during a large part 

 of the time. He has made a thorough 

 examination of eighteen Kansas coun- 

 ties and has assisted me materially 

 in determining the true character of the 

 field experiments, corroborating in a 

 great majority of instances the reports 

 of the farmers as to the working of the 

 infection in their fields. 



In this address I cannot enter exten- 

 sively into the subject of these experi- 



ments, but will give a brief statement 

 of the principal points connected with 

 the laboratory work with each of the 

 two fungus diseases. 



On May 23d we began our experi- 

 ments with Sporotrichum. We dis- 

 tributed some fungus-covered bugs from 

 the field of Mr. Mattocks in six infec- 

 tion jars. Into the jars had been put 

 soil taken from the yard, and green 

 wheat. Fresh chinch bugs sent by the 

 farmers were put into the jars — enough 

 to thickly cover the bottom. The jars 

 were covered with cheese cloth and set 

 into a glass case containing moist sand. 

 The soil in the infection jars was not 

 watered, so that the bugs were in a 

 humid atmosphere but not in contact 

 with water. We were in this way able 

 to secure the best conditions for the de- 

 velopment of the fungus. When the 

 bugs died in the jars new bugs from the 

 field were put in — the date of restock- 

 ing being also a record of the time 

 when the bugs in the jars had nearly all 

 died. The following is the memoran- 

 dum for the six jars started May 23d : 



May 23, June 4, June 20. 



May 23, May 27, June 4, June 15. 



May 23, June 4, June 15. 



May 23, May 27, June 4, June 15, 

 June 20. 



May 23, May 27, June 4, June 15, 

 June 20. 



Seven jars were started May 25th. 

 Their record is as follows : 



May 25, June 4, June 19. 



Ma y 2 5> J une 4' J une *5- 

 May 25, June 4, June 15. 

 May 25, June 4, June 15. 



