Professors Yoshimura and Kajita have graciously asked me to share with you some reflections on the history of our discipline,and some recollections of the twenty-six ICR conferences that I have been privileged to attend.My first conference of the ICRC series took place just fifty years ago,at Bagneres di Bigorre in Prance,but I was lucky to attend a world conference on cosmic radiation fourteen years earlier,in 1939.**I was a graduate student of Arthur Compton at the University of Chicago when he organized this meeting,which attracted many eminent physicists;(see Fig.1.Most of the participants are identified in Fig.1A.)It is noteworthy that not one of the attendees in this photograph would-at that time-have described himself as an astrophysicist.
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机译：Yoshimura和Kajita教授慷慨地让我与您分享对我们纪律历史的一些思考，以及我一直致力于参加的二十六名ICR会议的一些回忆。国际红十字国际委员会系列的第一个会议才占了五十次多年前，在普朗斯的Bagneres di Bigorre，但我很幸运能够在1939年之前参加宇宙辐射世界会议。**我是芝加哥大学的Arthur Compton的研究生，当时他组织了这次会议，吸引了许多杰出的物理学家;（见图1。最多的参与者在图1中确定了。）值得注意的是，这张照片中的某个与会者不会在那时 - 已经将自己描述为天体物理学家。
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