THE TECHNOLOGY QUARTERLY AND PROCEEDINGS OF THE SOCIETY OF ARTS. VOLUME XIII: BOSTON: MASSACHUSETTS INSTITUTE OF TECHNOLOGY. 1900. PUBLIC LIBRARY 231605 ASTOR, LENOX AND TILDEN FOUNDATIONS 1901 THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY held its first meeting on April 8, 1862. By the act of incorporation, which was accepted at this meeting, the SOCIETY OF ARTS was created as a part of the Institute coördinate with the School of Industrial Science. The objects of the Society are to awaken and maintain an active interest in the sciences and their practical applications, and to aid generally in their advancement in connection with the arts, agriculture, manufactures, and commerce. Regular meetings are held semi-monthly from October to May. The Society discontinued the publication of the Abstracts of Proceedings in 1891, and since then has published its proceedings and the principal papers read at its meetings in the Technology Quarterly. The present volume contains the proceedings from October 1899, to May, 1900, inclusive. The Quarterlyẻontains, also, the results of scientific investigations; carried ph; at the Institute, and other papers of interest to its graduates and: friends. Neither the Massachusetts Institute of Technology nor the SOCIETY OF ARTS assumes any responsibility for the opinions or statements in the papers. A Comparative Study of the Methods used for the George C. Whipple Measurement of the Turbidity of Water The Effect of Annealing upon the Physical Properties and the Microstructure of a Low Carbon Steel Permanent Standards for Use in the Analysis of Water. The Effect of Temperature, of Colloidal Ferric Hydrate, and of a Magnetic Field on the Hydrolysis of Fer- ric Chloride. Arthur G. Robbins |