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armature, or of a small piece of steel spring no larger than the pole of the electro-magnet in front of which it was placed, sufficed to produce audible effects in the distant room.

Electrical undulations can be produced directly in the voltaic current by vibrating the conducting wire in a liquid of high resistance included in the circuit, as water, dilute sulphuric acid, or saturated solution of salt.

Sullivan discovered that a current of electricity is generated by the vibration of a wire composed partly of one metal and partly of another; and it is probable that electrical undulations were caused by the vibration. The current was produced so long.as the wire emitted a musical note, but stopped immediately upon the cessation of the sound.

Although sounds proceed from the armatures of electromagnets under the influence of undulatory currents of electricity, he has been unable to detect any audible effects due to the electro-magnets themselves.

The telephonic effects described above are produced by three distinct varieties of currents, which he terms respectively intermittent, pulsatory, and undulatory. Intermittent currents are characterized by the alternate presence and absence of electricity upon the circuit; pulsatory currents result from sudden or instantaneous changes in the intensity of a continuous current; and undulatory currents are produced by gradual changes in the intensity of a current analogous to the changes in the density of air occasioned by simple pendulous vibrations.

The experiments were novel and successful, and were witnessed by a large audience.

The meetings were then suspended for the season.

Mr. George W. Hammatt was elected an Associate Member. Messrs. A. T. Hall, George W. Pratt, and Thomas W. Pratt, have died during the year. Eight members have resigned, and four have been dropped for non-payment of fees. The list now comprises 63 life and 185 associate members.

SCHOOL OF INDUSTRIAL SCIENCE.

The attendance at the School of Industrial Science for the year has been 299, as follows: Resident graduates, 11; Regular students of 4th year, 43; of 3d, 43; of 2d, 30; of 1st, 66;— Students not candidates for a Degreee: 4th year, 15; 3d year, 14; 2d year, 21; 1st year, 19; Architectural Students, 23; Students in Practical Design, 25, of whom 12 were femalestotal 299, of whom 8 were graduates of other Institutions. Of these about two-thirds were from Massachusetts, principally from Boston and its vicinity; from other New England States, 22; viz. from Maine, 6; New Hampshire, 6; Connecticut, 5; Rhode Island, 4; Vermont, 1. From other States, there were from New York, 9; Ohio, 8; Illinois, 7; Indiana, 3; Pennsylvania, Iowa, Kentucky, Minnesota, California, 2 each; New Jersey, Michigan, Virginia, and District of Columbia, one each; from Japan, 4; from the Hawaiian Islands, Canada, and New Brunswick, one each.

Thirty-four professors and teachers have been connected with the school, and several advanced students have rendered assistance in the various laboratories and in surveying. The fees rom students have amounted to about $46,000.

The class in the School of Design has been full, and the work has been entirely satisfactory.

The Lowell Free Courses for the year were as follows:

I. General Chemistry. Twenty-four laboratory exercises, of two hours each, on Wednesday and Saturday afternoons, at 2 o'clock, by Professor Nichols, beginning Nov. 3.

II. Qualitative Analysis. Twenty-four laboratory exercises, of two hours each, on Wednesday and Saturday afternoons, at 2 o'clock, by Professor Nichols, beginning Nov. 3.

III. Philosophy. Eighteen lectures for beginners, on Kant's Critique of Pure Reason, on Monday and Wednesday evenings, at 7 o'clock, by Professor Howison, beginning Nov. 8.

IV. Physiology and the Laws of Health. Eighteen lectures on Tuesday and Friday evenings, at 7 o'clock, by Professor Kneeland, beginning Nov. 9.

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V. Heat and its Applications. Eighteen lectures on Tuesday and Friday evenings, at 7 o'clock, by Professor Ordway, beginning Nov. 9.

VI. Perspective and the Perspective of Shadows, with Applications. Eighteen lessons on Wednesday evenings, at 7 o'clock, by Professor Ware, beginning Nov. 3.

VII. Light in its Relation to Color. Eighteen lectures on Wednesday and Saturday afternoons, at 3 o'clock, by Professor Cross, beginning Jan. 12, 1876.

VIII. Elementary German. Eighteen lessons on Monday and Wednesday evenings, at 7 o'clock, by Professor Otis, beginning Nov. 22.

These were open to both sexes over eighteen years of age; applicants to apply in their own hand-writing, stating age, occupation, and previous preparation. These courses are always

well attended by persons desirous of substantial teaching, and having a serious purpose of improvement.

MEETINGS OF THE CORPORATION.

The Corporation has held nine meetings during the year. At the meeting of Oct. 13, 1875, it was voted to establish a dining room for the students in the gymnasium building.

At the meeting of May 10, 1876, it was voted that the Committee on the School be authorized to cause a laboratory to be constructed for advanced instruction in Chemistry and allied subjects to women, provided that the funds are contributed by the "Women's Educational Association."

At the same meeting the Committee were authorized to open such departments of the school as they see fit, to advanced special students of either sex, or to special classes, where it can be done without interfering with the regular work of the schoolon payment of certain fees.

At the meeting of June 7th, it was voted to confer the Degree of Bachelor of Science on the following students who had complied with all the requirements therefor:

E. Cambridge

Reading.

Washington, D. C.

Boston

Framingham

San Francisco, Cal. . Science and Literat'e.

The subjects of the Theses, and the abstracts of the same, will be found in subsequent pages.

The progress of the School in the various departments will be found in the reports of the President and Professors.

At the meeting of Aug. 17th, it was voted to approve the plan for the new course in Practical Mechanism proposed by the President, and to construct a one story brick building for that and advanced and organic chemistry, the funds having been contributed by the Charitable Mechanic Association, the Women's Educational Association, and from sources unconnected with the funds of the Institute.

Boston, Oct. 2, 1876.

SAMUEL KNEELAND, Secretary.