Miscellaneous Intelligence. 365 



G. W. Gressman : The electrical resistance of lead amalgams at low tempera- 

 tures. 



F. Bedell, R. M. Klein and T. P. Thompson : The most efficient thickness of 

 transformer plate. 



N. H. Brown : Photographic studies of the electric arc. 

 Carl Barus: Exhibition of certain models in physics and dynamics. 

 P. H. Bigelow: Temperature and vapor gradients in the atmosphere. 

 E. W. Morley, H. T. Eddy and D. C. Miller: Report on the velocity of 

 light in a magnetic field. 



D. C. Miller: A study of standard meter scales ruled on nickel, silver and 

 glass. Exhibit of an automatic mercurial air pump designed by Prof. E. W. 

 Morley. 



S. T. Moreland: An apparatus for determining coefficients of induction. 

 J. 0. Thompson : Study of elastic fatigue by the time-variation of the logarith- 

 mic decrement. 



G. W. Patterson and Karl E. Guthe: A redetermination of the ampere. 

 Karl E. Guthe: Polarization and internal resistance of the voltaic cell. 

 Charles F. Brush : A new gas. 



Henry S. Werb: Hysteresis loss in iron for very small ranges of induction. 



W. 8. Franklin: Note on the testing of optical glass. A lecture room experi- 

 ment in electrostatics. 



Barry McNutt: A study of galvanic polarization. 



S. S. Clark: On a normal curve of magnetizatiou of iron. 



Thomas Gray : Some determinations of dielectric strength. 



H. T. Eddy: Graphical treatment of mutually inductive circuits with special 

 reference to the case of variable frequency. 



E. Rhoads: The effect of fibrous structure in iron on its change of length 

 when magnetized. 



A. Lawrence Rotch : Progress in the exploration of the air with kites at the 

 Blue Hill Observatory. 



C. L. Norton: The use of window glass having a diffusive actiou on light. 



F. P. Whitman : The relative brightness of pigments by oblique vision. 



F. C. Caldwell: Notes on the effect of silicon on the magnetic permeability 

 of iron. 



II. M. Goodwin and G. K. Burgess: The osmotic pressure of certain ether 

 solutions and the validity of the Boyle- Van't HolT law. 



II. M. Goodwin and M. de Kay Thompson': The dielectric constant and 

 electrical conductivity of liquid ammonia. 



A. G. Webster and B. F. Sharpb: A new instrument for the measuremeut 

 of the intensity of souud. 



A. G. Webster: A new chronograph ;.ud a means of rating tuning forks. 

 A geometrical method for investigating diffraction by a circular aperture. 



A! D. Cole : The measurement of electrical oscillations of short period and 

 their absorption by water. 



J. H. Smith : The effect of the secondary on the period of oscillation in a pri- 

 mary condenser circuit. 



Levi Orser: A harmonic piano and oro-an. 



E. B. Rosa and A. W. Smith: The efficiency of condensers. A calorimetric 

 determination of the energy dissipated in condensers. 



J. 0. Reed: An acoustical micrometer. 



Knut Angstrom: An instrument for measuring radiance, 



C. P. Matthews: A device for recording photometer readings. 



W. A. Anthony: Polarization in the Zn-HoS0 4 cell. 



Section C. Chemistry. 



H.. W. Wiley : The influence of temperature upon the specific rotary power of 

 sucrose. 



W. A. Noyes and N. M. Austin : The determination of water and coke in 

 coal. 



W. F. HilleBrand : Notes on determination of water in coal. 



Charles E. Munroe : Analysis of mixed acids. 



S. P. Mulliktn and Harwood Scudder: A simple color reaction for the 

 detection of methyl alcohol. 



Am. Jour. Scl— Fourth Series, "Vol. VI, No. 34- October, 1898, 

 25 



