326 



SCIENCE 



[N. S. Vol. XLIV. No. 1131 



An Electrical Insulating Material for Use in Moist 



Atmospheres: Edward W. Washburn. 

 Types of Wheatstone Bridges for Alternating Cur- 

 rent Work: Edward W. Washburn. 

 Induced Reactions in the Analytical Chemistry of 



Lead: V. H. Gottschalk. 

 An Attempt to Combine Nitrogen and Chlorine 

 Directly: B. R. Honovski, L. C. Johnson, F. 0. 

 Anderegg and W. A. Notes. 

 Pure nitrogen and chlorine are sparked in a 

 glass apparatus, using gold tipped electrodes. Re- 

 sults vary from 0.2 mg. to 1.5 mg. of combined 

 nitrogen on Nesslerizing. These values were 

 checked by blank analyses at all times. 



The Nernst Integration Constant in Gaseous Sys- 

 tems: N. Howell Purman. 

 Attention is called to the fact that owing to the 

 lack of sufficient data concerning the specific heats 

 of solids over wide range of temperature, and the 

 absence of such data in the case of liquids, the ra- 

 tional vapor pressure formula, 



Vwn 



2± 



RT 



+ f^ f2 dTf[e p -c]dT+i, 



can rarely be applied to the interpretation of vapor 

 pressure measurements. 



The Nernst approximation formula, 



lOg 7T = 



imT+ 1 - 75l0 * T -jjxi T+c > 



is more generally applicable, but care must be ex- 

 ercised in its employment, otherwise the values 

 deduced for the several constants will not possess 

 any physical significance whatever. 



These points were illustrated by numerical cal- 

 culations. 

 The Reactivity of Acids: Hugh S. Taylor. 



The Specific Seat and Specific Kinetic Energy of 

 Elements and Compounds : J. E. Siebel. 

 After devising formulae for the specific molecular 

 kinetic energy increase, the author determines this 

 and corollary quantities for representatives of dif- 

 ferent groups of gases and vapors. The tabulated 

 results demonstrate the constancy of their molec- 

 ular kinetic energy against the inconstancy of their 

 molecular heat (Dulong and Petit product) ; they 

 also yield the molecular velocity in harmony with 

 Millikau 's number of molecules, the relation of 

 molecular velocity to sound propagation, the 

 equivalent of volume- and kinetic-energy, etc. Ac- 

 cordingly these quantities appear as functions of 

 the rectilinear, progressive motion of the molecules 

 not dependent, that is not directly so, on other 

 intermolecular-latent-disgregation- or rotary-energy. 



Vapor Pressures of Ethyl Alcohol and Alcoholic 

 Water Mixtures at 25° and Composition of 

 Vapors in Equilibrium with the Mixtures: I. H. 

 Derby and F. Daniels. 



Composition Dissociation in Concentrated Solutions 

 of Sodium Chloride and Potassium Chloride: I. 

 H. Derby, D. Mayard and E. T. Pegon. 



The Dissociation Pressures of Various Salt Hy- 

 drates and the Vapor Pressures of their Satu- 

 rated Solutions: I. H. Derby and V. Yngve. 



The Swelling of Rubber in Various Liquids and 

 the Nature of the Process: I. H. Derby, P. D. 

 Schultz and O. D. Cunningham. 



A Study of 0.1 Normal HCl Calomel Electrodes: 

 N. E. Loomis. 



division of pharmaceutical chemistry 



John H. Long, Chairman 



Geo. D. Beal, Secretary 



The New Features of the U. S. P. IX. : Joseph P. 



Remington. (Lantern.) 

 The Toxicity of the Volatile Principles of Coffee, 



with Comments on Coffee Substitutes: L. E. 



Sayre. 

 The Pancreatin Tests of the Pharmacopoeia: J. H. 



Long. 

 Rennett: A Note and a Correction: Howard T. 



Graber. 

 Pepsin: A Resume of Tests: Howard T. Graber. 

 Relative Toxicity of Different Species of Digitalis: 



Robert A. Hall, E. L. Newcomb and R. E. 



Morris. 

 On the Apparent and Real Ash Content of Digi- 

 talis: Norbert Mueller and Edward Kremers. 

 Alkaloidal Assay by Immiscible Solvents: H. F. 



Lewis and G. D. Beal. 

 The Preparation and Characteristics of Emetine: 



Prank O. Taylor. 

 Some Unexpected Reactions in Pharmaceutical 



Mixtures: Prank 0. Taylor. 

 The Strength of Fluid Extracts: H. A. Langen- 



han and Edward Kremers. 

 On Tincture of Peppermint for Coloring Purposes: 



Norbert Mueller and Edward Kremers. 

 Further Notes on the Identification of the Emo- 



din-containing Drugs: Ruth E. Okey and G. D. 



Beal. 

 Determination of Small Amounts of Water and 



Alcohol in Ether for Anesthesia: E. Mallinck- 



rodt, Jr. 

 The Detection of Minute Quantities of Unsatu- 

 rated Hydrocarbons in Liquid Petrolatum: C. 



H. Briggs and W. L. Irwin. 



Charles L. Parsons, 



Secretary 



