Summer School of Geology.

The object of this school is to train students who wish to fit themselves for geological work in the field, and to aid teachers in acquiring methods of instruction in the elements of geology. It will be conducted by the instructors in geology at Harvard College.

The school will open on July 6th at the Museum of Comparative Zoology in Cambridge, where a fortnight will be spent in introductory work and in short daily excursions. The remainder of the six weeks' session will be divided between the Connecticut Valley, the Hoosac Valley and vicinity, in northwestern Massachusetts, and the foothills of the Catskill mountains in eastern New York. Some central, characteristic point in each district, easily accessible by railroad, will be taken for headquarters and short excursions made from it. The plan of the school, so far as it can now be stated, is as follows:

July 6th to 22d, at Cambridge. Lectures, laboratory work and excursions in charge of Professor N. S. Shaler, assisted by Mr. T. W. Harris. Professor Shaler will lecture every week day in the field laboratory on the following subjects: 1. The general principles of the application of force to the surface of the earth; 2. Erosion by rivers and by the sea; 3. Glacial phenomena; 4. Faults, veins and dikes. The field work will include a study of the sea-coast at several points between Cape Ann and Cohasset, and at certain inland areas selected to show the nature and distribution of drift deposits and other phenomena. The laboratory work will be arranged to illustrate as far as possible the problems encountered in the field during the session of the school.

July 23d, Cambridge, Mass., to New Britain, Conn.

July 25th to 29th, at or near New Britain, Conn., in charge of Professor W. M. Davis. Study will here be made of the structure and physical history of the Triassic sandstones and trap-sheets of this part of the Connecticut Valley. with special attention to the preparation of geological maps and sections.

July 30th, New Britain, Conn., to Catskill, N. Y.

August 1st to 9th, at or near Catskill, in charge of Professor Davis. This week will be given to the examination of the Silurian and Devonian formations exposed in the foothills of the Catskill mountains, with collection of the characteristic fossils, study of structure in its relation to topography, and construction of geological maps and sections. A day or more may be given to the ascent of the Catskill mountain front, returning by the Kaaterskill clove.

August 10th, Catskill, N. Y.; to North Adams, Mass.

August 11th to 16th, at or near North Adams, in charge of Mr. J. E. Wolff. This week will be spent in the study of the Taconic rocks and stratigraphy as found in the Greylock mountain mass, and of the metamorphic rocks of the Green mountains and their stratigraphy as exemplified by the structure and rocks of Hoosac mountain.

As the special object of the school is to teach students to observe, the instruction will be necessarily limited in range and will be directed chiefly to the explanation of problems met in the field. Advanced knowledge of geology will not be required, but only teachers, graduates of colleges or persons of maturity and some training can be admitted. Only men can be accepted as students. Each student should have a satchel, note-book, hammer and compass. There will be opportunities to collect rocks and fossils.

Applicants for membership should address T. W. Harris, Divinity Hall, Cambridge, Mass., not later than June 1st. Before their enrolment on June 15th, they will pay a tuition fee of thirty dollars ($30). Each student will bear his own living and travelling expenses, but these will be reduced as much as possible by special arrangements with hotels and railroads. The cost of the session cannot be exactly reckoned beforehand, but it is estimated as follows: Six weeks' boarding and lodging $40 to $60; travelling expenses with the school, $15 to $20.