1890.] Proceedings of Scientific Societies, ` 1107 
{introduced by S. Weir Mitchell). !On the Growth of Children ‘stu- 
died by Galton’s method of Percentile Grades—Henry P. Bowditch. 
! On Electrical Oscillations in Air, together with Spectroscopic Study 
of the motions of Molecules in Electrical Discharges—John Trow- 
bridge. Some considerations regarding Helmholtz's Theory of Dis- 
sonance—Charles R. Cross (introduced by F. A. Walker). 2A Critical 
Study of a Combined Meter and Yard upon a surface of Gold, the 
Meter having subdivisions to two millimeters, and the Yard to tenths 
of inches—W. A. Rogers. On Evaporation as a disturbing Element 
in the determination of Temperatures—W. A. Rogers. 2 On the use 
of the Phonograph in the Study of the Languages of the American 
Indians—J. Walter Fewkes (introduced by Alpheus Hyatt). 1 On the 
Probable Loss in the Enumeration of the Colored People of the United 
States at the Census of 1870—Francis A. Walker. On the Capture of 
Periodic Comets by Jupiter—H. A. Newton. On the Proteids of the 
Oat Kernel—Thomas B. Osborne (introduced by S. W. Johnson). On 
the Present Aspect of the Problems concerning Lexell’s Comet— 
S. C. Chandler. ?The Great Falls Coal Field, Montana; its Geo- 
logical Age and Relations—J. S. Newberry. Notes on the Separation 
of the Oxides in Cerite, Samarskite and Gadolinite—Wolcott Gibbs. 
On the Relationships of the Cyclopteroidea—Theo. Gill. On the 
Origin of Electro-Magnetic Waves—Amos E. Dolbear (introduced by 
John Trowbridge). 
1 Read November rrth. 2 Read November r2th. 
