From his grandson, Oliver Jolles...Oscar Jolles (he was mostly known this way, instead of Oskar) was awarded the degree of Doctor of Philosophy at Jena university in 1886, with a monograph Die Ansichten der deutschen nationalökonomischen Schriftsteller des sechszehnten und siebzehnten Jahrhunderts über Bevölkerungswesen.I do not know exactly when he started to work at H. Bertho...[ Detail ]