586
JOLWNAL OF CHEMICAL EDUCATION
MARCH, 1830
Summary The results of this research have shown that, in the experimental classes described where fairly normal school conditions have been maintained, 1. For the total population tested the "recitation first" method is somewhat superior to the "laboratory first" method of teaching. 2. For the pupils in equated groups of the upper quartile the "laboratory first" method shows a superiority in the immediate test and the "recitation first" method, a superiority in the delayed tests. Both methods seem to work about equally well for bright pupils. For the students of the lower quartile, the "recitation first" method gives better results. 3. For both upper and lower quartiles, as well as for the total population, retention is greater following the "recitation first" method than following the "laboratory first" method. 4. A teacher's preference for a method has an influence upon his success in teaching by experimental procedures. 5 . The size of school has less effect upon comparative mean percentage scores than was predicted. 6. The coefficient of correlation for the immediate test used with scholastic averages for the total population tested was 0.523, and that for the immediate test with the delayed test was 0.757. 7. A plan has been described whereby a cooperative research on methods of teaching has been carried through to completion by a group of teachers widely separated geographically in the state of Illinois." The writers wish to expess thanks and appeciation to The Chemical Foundation, Inc., forfinancial aid in this research, and to Dean Charles E. Chadsey, Professor Walter S. Monroe, and Professor B. S. Iloflkins for their interest and encouragement during its pogress. 6 ' The teachers coBperating with the writers were as fallows: R. R. CAMUCK, Marion; J. C. CHIDDIX,Normal; ORSON CROXTON, Watseka; H. W. GARNEW,Bloomington; G. C. HICKLE,Jacksonville; L. J. HnL, Litchfield; WILLIAMHOLST,Granite City; WALDO HORRABIN, Western Illinois State Teachers' College, Macomb: ELIEABETE LONGBONS, Hartisburp; ALETAMcEvoy, Rockford; H. C. Moon, Robinson; H. I,. OLSSEN,Elmhurst; J. F. PINKERTON, Rushville; JESSE SHIDLER,Fairbury; D. M. SIMER,Decatllr; SISTER LOUELLA, Blaomington; W. G. Tnsmtu, Paxton; C. I). TOMHCKO, Bourbonnais; ROBERTA WHITNAH, Roanokc; MAX WOODWORT1i. I'ittsfield.
Quantum Theory Wins Another Victory. Quantum mechanics, one of the latest developments in physics, won another victory over the older ideas of physics when Dr. Philip M. Morse of Princeton and the Bell Telephone Laboratories reported recently to the National Academy of Sciences t h a t the quantum mechanical theory of the electron, the particle of matter and electricity, explains not only the general effect of scattering of electrons when they are shot a t crystals, but also small peculiarities in the experimental results that appear when electrons nre consider4 to be just like X-ray heams in thpir action.-Srienre S m ? m
