Fresh Light on the Cause of Cancer

PROF. JOHANNES FIBIGER, of Copenhagen, describes in a long article in the Berliner klinische Wochenschrift for February 17 some experiments which carry our knowledge of the relation between the origin of cancer and external causes a step further. The present writer has been aware of these observations since August, 1911, but they have been in progress since 1907. They have, therefore, been pursued for some five years, which indicates alike the difficulties overcome and the praiseworthy pertinacity of the investigator.