308 Scientific Intelligence. 



J. R. Eastman: Determination of weights of observation. 

 L. A. Bauer: On the distribution and the secular variation of terrestrial 

 magnetism, No. IV. On the component fields of the earth's magnetism. 



A. Macfaelane: On the composition of simultaneous and successive vectors. 



Section B. Physics. 



F. E. MiLLTS: An experimental study of the charging aud discharging of con- 

 densers. 



W. LeConte Stevens: Notes on certain physical difficulties in the construc- 

 tion of modern large guns. 



Ernest Merritt : On the photographic trace of the curves described by the 

 gyroscopic pendulum. On the distribution of high frequency alternating currents 

 throughout the cross-section of a wire. • 



E. R. VON Nardroff : On the compactness of a beam of light. 



W. S. Franklin: Some points in the mechanical conception of the electro- 

 magnetic field. 



Brown Ayres : Mechanical models of the electric circuit. 



Henry T. Eddy: Graphical treatment of alternating currents in branching 

 circuits. 



Frederick Bedell and James E. Boyd: Note on the effect of odd harmonics 

 upon the virtual values of periodical varying quantities. 



Alexander Macfarlane : On the rule for the dynamo and motor. 



"W. A. Rogers: Description and exhibition of a convenient form of the "In- 

 terferential Comparer," and of an interferential caliper attachment for use in 

 physical laboratories. Description and exhibition of a bench comparator for 

 general use in physical laboratories. Experimental determination of the relative 

 amounts of work done in changing the lengths of two metal bars under the same 

 thermal conditions, by an envelope of heated air, and by pure radiations in a 

 vacuum. An experimental method of finding the value of a unit of force in any 

 system whatever. 



Edward B. Rosa : A new alternating-current curve-tracer. 



B. PI Moore: Visible electric waves. 



A. D. Cole : Electric waves in long parallel wires. 



Edward L. Nichols and John Anson Clark: The influence of a static 

 charge of electricity on the surface tension of water. 



W. S. Franklin and L. B. Spinney: Determination of the specific heats of 

 nitrogen by adiabatic expansion. 



L. B. Spinney: The analysis of vowel-sounds, by means of the sympathetic 

 vibrations of a rigid body. 



C. P. Hart: Polar and interpolar effects of the galvanic current on living 

 animal tissues. 



H. J. Hotchkiss: Description and exhibition of a portable apparatus for 

 recording curves of alternating currents and electro-motive force. 



Section C. Chemistry. 



T. H. Norton: Points in teaching technical chemistry. On some new forms 

 of gas generators. 



O. 0. Caldwell: The aim of qualitative analysis, 



H. P. Talbott: The aim and methods of the college course in qualitative 

 analysis. 



A. L. Green : The teaching of qualitative analysis. 



F. P. Venable : The use of the periodic law in teaching general chemistry. 

 W. P. Mason: Chemistry at the Rensselaer Polytechnic Institute. 



P. C. Freer: Laboratory instruction in organic chemistry. 



A. A. Noyes : Laboratory instruction in organic chemistry. The teaching of 

 physical chemistry. 



Ellen H. Richards : Instruction in sanitary chemistry at the Mass. Institute 

 of Technology. 



J. L. Howe and P. S. Mertins: Notes on Reinsch's test for arsenic and 

 antimony. 



E. D. Campbell : The limits of accuracy in analytical work. 



