Sax Will Talk on Population, Food

John D. Black, Henry Lee Professor of Economics, and Karl Sax, professor of Botany, will discuss the problems of population pressures and foot supply at 7:30 p.m. tonight in the Lowell House junior common room.

The two men will consider the general nature of population barriers and how they affect world progress. They will consider both the nationalistic and cultural aspects of the spread of ethnic groups. Their talk will be sponsored by the World Federalists.

Black is an authority on agricultural economics, and has been advising Congress on questions of domestic farm policy for 15 years. Sax has done work in the field of genetics and the relation of population increases to agriculture.