A heart attack suffered last week will prevent Professor Raphael Demos from giving his Philosophy courses this term, the Philosophy Department announced last night.

Demos was stricken with coronary thrombosis on Sunday, January 29, and has been in the Faulkner Clinic in Brookline since then. He is not expected to leave the clinic before June.

Phillip H. Rhinelander '29, teaching fellow in General Education, will take over Philosophy 1b, the history of modern philosophy. Professor John D. Wild will give Philosophy 105, Demos' course on Aristotle.

Ernest J. Knapton, lecturer in History, has also taken sick, the History Department revealed yesterday, and will not be able to give his scheduled course, History 32, this term. The Department has not yet decided who will replace him.