able, though he offered the suggestion that the best use of the books would be secured if they might be separately shelved from other classes of books and if a catalogue of them and the other pre-Linnean books of the library might be printed, so that persons wishing to make use of them might know where they were to be found. Visitors to the library are more interested in the quaint volumes of this part of its contents than in any other, and investigators have called its treasures into use on many occasions, not infrequently writing from a distance for transcripts of passages that they have needed to use, but have not been able to consult elsewhere. Sometimes, for days at a time, students of particular groups of plants long cultivated, have been occupied with the camera, reducing to unimpeachable