Natural History Walks.

Starting from Harvard square on Saturday mornings at 9 o'clock, Dr. Jaggar will conduct a series of excursions throughout the spring, open to all men interested in geology, botany, ornithology or other outdoor sciences. These walks are led across country regardless of pathways, with a view to seeing and exploring as many different kinds of topography as the country affords, and each man may note as he pleases the plants, birds, minerals or rocks. The leader's object will be geological, and the pace rapid; those who go may follow closely or drop out when they choose. All taking part in these walks are advised to take luncheon with them and to be prepared for rough country, including swamps, thickets, woodland and steep hills. Officers of instruction and government are urged to go as well as students. The first excursion will be made this morning, and will cover the hills north of Medford, crossing the Middlesex Fells to Melrose.