Music 7, a course in Instrumentation offered in alternate years, will be given during 1900-01 by Professor Paine and Mr. Spalding. The work of the course consists of three parts. 1. Lectures on the history of musical instruments, and the art of instrumentation. 2. Written analyses and descriptions of the most important vocal and orchestral works of Handel, Bach, Haydn, Gluck, Mozart, Beethoven, Mendelssohn, Von Weber, Berlioz, Liszt, Wagner, Brahms and other modern composers. 3. Exercises in orchestration, with various combinations of string, wind and brass instruments, illustrated by chorals, national airs and short selections from the works of various masters, together with a few original pieces. Original compositions scored by pupils will be played in rehearsal by a Boston orchestra, so that the pupils may hear the effects of their own orchestration. Especially noteworthy is the reduction in the amount of experience and practical ability required for admission to course 3. Hereafter only slight proficiency in vocal or instrumental music will be required.

In the division of American Archaeology and Ethnology, Mr. J. H. Woods, a new instructor in Anthropology will have charge of Half-course 32, which treats of primitive religions. Dr. Russell will give Half-course 41, Prehistoric Archaeology. Half-course 52 is made to include a somewhat broader field than last year. It gives a general review of civilizations of the ancient Mexicans, Central Americans and Peruvians, relying upon the valuable collections in the Peabody Museum for examples of the arts of these peoples. A comparative study is made of the archaeology of the remainder of South America and of such parts of North America as are not dealt with in course 1.

Several changes appear in the division of Mathematics.

Assistant - Professor Bocher will be absent on sabbatical leave, and all his courses are bracketed, except Course C and Half-course 121, which will be given respectively by Professor Byerly and by Assistant - Professor Osgood, who has been absent on leave this year. Mr. J. L. Coolidge will give Course D and will assist in Courses E and F. He will also offer a new course, 28, on "The Geometry of Position." Course 22, offered by Mr. Whittemore, is also new. It is entitled "Introduction to the Differential Geometry of Twisted Curves and Surfaces."

Assistant Professor Osgood will have Courses 4 and 16, and will offer a new course of research, 20E, on "Selected Topics in Higher Analysis." Professor Peirce will offer a new half-course, 27, on "The Elements of the Mathematical Theory of Elasticity." He will also give a new half-course, 23, on "Quaternion Imagin- aries and other selected topics in Quaternions." Course 6, "The Calculus of Quaternions," will be omitted next year, as will Half-course 7a, and Courses 11, 25 and 20G, a course in Reading and Research.

In the Department of Geology and Geography, Dr. Daly will give a new half course, Geology 112, on the subject of Oceanography. The object of the lectures will be to give a comprehensive view of what is known regarding the larger problems of the ocean. Geology 172 will again be offered, and will cover a somewhat broader field. The lectures on experimental and dynamic geology will be illustrated by experiments. Other courses which were omitted this year but will be offered during 1900-01, are Geology 271 and 11. Geology 72 and 21 are bracketed. In Half-course A1, Dr. Daly will take the place of Professor Davis.

In the Department of Mineralogy and Petrography, Professor Wolff will give Mineralogy 31 and 12 next year. He will also give Mineralogy 20 together with Dr. Palache. Metallurgy 21, offered by Mr. Sauveur, will hereafter include only the metallurgy of iron and steel, omitting copper and nickel, which will be dealt with in Course 32, given by Mr. Raymer. A new feature in Course 4, on "Ore-Dressing, Concentration, and Milling," will be the laboratory work, which will enable the student to become acquainted with the use of modern machines for handling ore. Mr. White, who has charge of Half-course 61, will also offer a new advanced course, Metallurgy 7, taking up metallurgical chemistry. Mining 101 will be given by Mr. Raymer, who will offer a new half-course, Mining 112, for the study of the hoists, pumps, drills, compressors, and haulage equipment of a mining plant. Mr. Sauveur will give a new course of research in "Metallography and the Physics of Metals.