It has been a marvel to most reflecting people how Prof. Riley gets through with so much original and very useful work. But we are sorry to learn that it has its severe price in broken-health, while there is so much new around him he must investigate and learn. The only course left is to order him away form the tasks he loves. He will leave on the 1st of June for Europe. We fear, however, there will be found something new under the sun, even in the Old World; and we can only hope men of science there who will naturally seek to honor him, will not place anything in the way of his speedy return to us here.

Prof. C. V. Riley has returned from Europe much improved in health, and as full of useful work as ever.