Chemistry and Physics 51 



the meteorological ascents in the air or by hydrographical soundings. It is shown 

 how complete representations of the fields of pressure and of mass in atmosphere 

 and in hydrosphere can be derived from the observations obtained in this way, and 

 the book contains a complete set of numerical tables for use in performing this work. 

 The uses of the developed methods are illustrated by several extensive examples. 



PART II, KINEMATICS, by V. BJERKNES, TH. HESSELBERG, and O. DEVIK. ix-f- 

 175 pages, 113 text figures. (With Atlas of 60 charts.) Published 1911. 

 Price $6.00. (Out of print.) 



This part of the work deals with the principles for drawing charts representing 

 the fields of motion in atmosphere and hydrosphere, and develops the practical 

 methods required for passing from the single observations to these continuous rep- 

 resentations of the motion. From the observation, charts representing the horizon- 

 tal component of the motion are first derived. These charts being found, it is 

 shown how other charts, representing the vertical component of the motion, can be 

 derived by making a proper use of the hydrodynamic surface condition and of the 

 equation of continuity. The methods are also developed for deriving charts of 

 acceleration from two charts representing the velocities observed at two successive 

 epochs. The methods used in drawing these different kinds of charts may be con- 

 sidered as examples of a special "graphical algebra" and "graphical differential and 

 integral calculus," of which the fundamental principles are developed in two special 

 chapters. 



This part is accompanied by 60 plates, 24 of which give a bathymetrical and hyp- 

 sometrical map of the world on the scale 1 : 20,000,000, destined for use in meteoro- 

 logical and hydrographical investigations. The others give examples of atmospheric 

 fields of motion. 



PART III, DYNAMICS (in preparation). 



No. 44. SCRIPTURE, E. W. Researches in Experimental Phonetics. The Study of 

 Speech Curves. Quarto, 204 pages, 13 plates, 138 text figures. Pub- 

 lished 1906. Price $2.00. 



These investigations had their origin in an attempt to apply physical methods in 

 studying the nature of verse. The work was begun at Yale University, and was 

 continued at Munich, where a laboratory was installed and valuable assistance re- 

 ceived from the Psychological Laboratory of the University of Munich. The work 

 was later continued at the Psychological Laboratory of the University of Berlin. 

 The volume gives an account of the apparatus used in recording sounds and of the 

 methods applied in obtaining speech curves. A chapter on qualitative analysis indi- 

 cates how phonetic facts may be read directly from the speech curves without meas- 

 urement. It is also explained how such fundamental factors of speech as melody, 

 duration, and amplitude can be obtained from the curves by simple methods of 

 measurement. The method of harmonic analysis is carefully considered, the theories 

 of vowel productions are discussed, and detailed examples of vowel analysis are given. 



No. 135. BAXTER, G. P., in collaboration with M. A. HINES, H. L. FREVERT, J. 



HUNT WILSON, F. B. COFFIN, G. S. TILLEY, EDWARD MUELLER, R. H. 



JESSE, JR., and GRINNELL JONES. Researches upon the Atomic Weights 



of Cadtnium, Manganese, Bromine, Lead, Arsenic, Iodine, Silver, etc. 



Octavo, vn+185 pages, 5 text figures. Published 1910. Price $2.00. 

 This book consists of a collection of papers upon the atomic weights of certain 

 common elements, and embodies the results of researches of which the experimental 

 work has been carried on in the Chemical Laboratory of Harvard College during 

 the years 1904-1909. The following are the subjects of the individual investigations: 

 The analysis of cadmium chloride, the analysis of cadmium bromide, the analysis of 

 manganous bromide and chloride, the synthesis of silver bromide and the ratio of 

 silver bromide to silver chloride, the analysis of lead chloride, the analysis of silver 

 arsenate, the synthesis of silver iodide and the ratio of silver iodide to silver bro- 

 mide and silver chloride, the analysis of iodine pentoxide, the analysis of silver 

 chromate, the analysis of silver dichromate, and the analysis of silver phosphate. 



