1939-02-27: Wilhelm Reich: Thank you for your help in determining the radiation
Dear Dr. Bon,
I am very grateful that you have agreed to help me determine the radiation. I would like to give you as a preliminary guide some of the main observations that have been made since my first letter to you.
1. The cultures fill the room in which they are located with a strange something that, after approximately ten to forty minutes, depending on the individual, is experienced as a curious heaviness.
2. They penetrate the packaging of X-ray films, cardboard covers, thin wooden boards.