The speaker illustrated the process by a number of experiments showing the reduction of MnO2, FeO3, CaSO4, and numerous other interesting reactions. Of special interest was the reaction of powdered aluminum with Al,O,, demonstrating apparently the formation of a lower oxide; the energetic decomposition of water; and the reduction of sodium phosphate with the production of phosphorus. Dr. H. F. Keller followed with an exhibition of a fine series of lantern slides illustrative of the history of chemistry. One series consisted of portraits of the masters of the science, and another principally of apparatus employed in epoch-making discoveries. The speakers were given a vote of thanks and the meeting adjourned. Secretary. MECHANICAL AND ENGINEERING SECTION.—-Stated Meeting held Thursday, December 12th. Mr. A. M. Greene, Jr., in the chair. Present, 27 members and visitors. Mr. James O. Nixon, of the Link-Belt Engineering Company, gave an account of the Renold Silent Chain Gear, illustrating the subject by specimens of the device, and by a series of views exhibiting its application for driving machinery where its advantages were specially apparent. The discussion which followed was participated in by Messrs. Fullerton, Greene, and the author. Mr. Greene made some remarks on the so-called tangential or impulse water-wheels, illustrating the subject by the exhibition of Pelton and Dobel styles of buckets. On Mr. Greene's suggestion a special committee was appointed to arrange for the presentation at the meetings of abstracts on current advances in engineering and the mechanical arts. The Executive Committee was instructed to present nominations for officers for the year 1902, at the stated meeting of January 8th. Adjourned. DANIEL EPPELSHEIMER, JR., Secretary. MINING AND METALLURGICAL SECTION.-Stated Meeting of Wednesday, December 11th. F. L. Garrison, President, in the chair. Mr. Wm. Campbell, of Columbia University, New York, presented a supplement to the paper of Dr. Mathews on "The Constitution of Metals and Binary Alloys." The subject was profusely illustrated with lantern slides. G. H. CLAMER, Secretary. ELECTRICAL SECTION.-Stated Meeting held Thursday, December 19th. Mr. Morris E. Leeds in the chair. Present, 50 members and visitors. The Executive Committee was instructed to report to the stated meeting of January a list of nominations for officers to serve for the year 1902. Mr. Paul M. Lincoln, of Niagara Falls, presented a paper entitled, “On the Parallel Operation of Alternating Current Generators," which was freely discussed. [The paper will appear in full in the JOURNAL]. Adjourned. THOS. SPENCER, |