The Harvard Union will hold a debate this evening on the subject of the Princeton Debate. Resolved: That, assuming the adoption of adequate constitutional amendment, the United States should institute a system of responsible cabinet government. The principal disputants will be" Aff. B. H. Hayes, '98 and Hermann Robinson, '98. Neg. N. B. Marshall, L. S. and A. M. Kales, L. S. Many other prominent members will speak from the floor, and an interesting debate is expected, on account of the prominence of the subject.