10 August 1936   
Frankfurt            

The heat unbearable these last days. Still, dare not leave the apartment. Much trouble in this part of city—beatings, broken shop windows, etc.

Must concentrate on financial outlook. By new laws, Emma can give piano lessons only to other Jews. Her father fears he will lose store. Some friends trying to get out.

Since reduced to two days a week by Herr Thomas, have set up alternate facility in basement. So work uninterrupted. Early tests on version #531 of compound, new synthetic modification, show excellent potential. But laboratory supplies getting harder to come by, like everything else.