The director of the Institute, Nagayo, although this volume contains none of his own contributions, has good reason to be proud of the work of his associates. The 650 pages are replete with interesting reports of experimental work which comes up to a high standard.
The section on biology contains a series of studies by Miyagawa (the editor of the volume and his assistants) on the effect of injections of autolysates various organs. Injections of such materials invariably cause profound degenerative changes in the corresponding organ. An adequate explanation is not vouchsafed for this unusual phenomenon.
The most striking feature of the volume, however, is the article by W. Nakahara on the filtrable virus of the Rous chiken sarcoma. By a well planned series of investigations, he has shown beyond a doubt that the so-called "causative agent" actually does contain live sarcoma cells. By staining methods he first showed that