A special number of the Cambridge Tribune will be published next Friday. It is to be illustrated with pictures of interest to Harvard men. It will contain all information about Class Day needed by visitors, and will be an excellent souvenir of the occasion. The most notable illustration will be the reproduction of a copper-plate engraving of the college buildings in 1775 made by Paul Revere. The plate has been preserved in the Massachusetts State archives. The price of the paper will be five cents. Advance orders for numbers to be mailed out of town may be left at the Tribune office.