Dr. Mahan, who was the first, and for fifteen years, President of Oberlin College, has since been for nearly as long a period the President of Adrian College, in this State. He says that, during his connection with Oberlin, the proportion of young men to young women who entered upon the course, and failed to complete it on account of failure of health, under the strain of thought and study, was at least _two to one_. The proportion was not quite so great in Adrian; but many more young men than young women--and, as far as he was acquainted with colleges, everywhere--succumbed under the change from their former life to one of study. Dr. Mahan also says that, owing to the peculiar circumstances under which Oberlin College was established, he has, through subsequent years, maintained a far more familiar acquaintance with his former students than is common for old teachers to do; and that he can count many more broken-down men, among his old graduates, than broken-down women. It would be impossible for one now to conceive the obstacles in the way of the girls who were first admitted to study at Oberlin. Every step was achieved through a moral battle with public opinion and popular prejudice, the depressing effects of which cannot now be estimated. And yet they did go through--stood as high during their whole course, and in their graduating exercises, as the young men. They are all of them married, mothers of families of children, and are strong and healthy, far above the average of American women.