102 



REPORTS ON INVESTIGATIONS AND PROJECTS. 



Point. 



Benzophenone (Kahlbaum), boiling- 

 point at 760 mm. 



Cadmium, melting-point 



Zinc, melting-point 



Sulphur, boiling-point at 760 mm 



Antimony (Kahlbaum), melting-point 

 Aluminum, melting-point 



Temperature. 



Const, vol. 

 Po=l at. 



305.85 



320.8 

 419-3 

 444 40 

 629.8 



658.5 



Thermo- 

 dynamic. 



Notes. 



305-9 



320.9 

 419.4 



444-55 

 630.0 



658.7 



Transferred by platin-rhodium and 

 copper constantan thermo-ele- 

 meuts. 



Interpolated. 



Transferred by thermo-elements. 



Direct. 



Transferred by thermo-elements. 



Interpolated. 



(7) Die StickstofTthermometerskala von 300-630 und eine direkte Bestimmung des 

 Siedepunktes des Schwefels. Arthur L. Day und Robert B. Sosman. Ann. 

 Physik, 38, 849-869. 1912. 



A German translation of " The nitrogen thermometer scale from 300 to 

 630°, with a direct determination of the boiling-point of sulphur" (Am. 

 Jour. Sci. (4), 33, 517-533, 1912). Reviewed under No. 6 above. 



(8) A note on the standard scale of temperatures between 200 and 1100 . L. H. 



Adams and J. Johnston. J. Wash. Acad. Sci., 2. 275-284. 1912. 



A preliminary publication of the results described in paper No. 9: 



(9) A note on the standard scale of temperatures between 200 and 1100 . L. H. 



Adams and J. Johnston. Am. Jour. Sci. (4), 33, 534-545- 1912. 



In this note is given a new calibration curve for copper-constantan thermo- 

 elements, extending from o° up to 360 , together with a series of inde- 

 pendent measurements of the temperature differences between the boiling- 

 points of naphthalene (217.95 ) and benzophenone (305.9 ) on the one hand 

 and the freezing-points of tin, bismuth, cadmium, and lead on the other. 

 These measurements lead to the following values of the freezing-points : 

 Sn, 231.8 ; Bi, 271.0 ; Cd, 320.9 ; Pb, 327.3 . The concordance of these 

 values with those obtained by other measurements show that the thermo- 

 element is not inferior to the resistance thermometer within this range of 

 temperature (o° to 360 ). Moreover, a comparison of the gas-thermome- 

 ter determinations with the results obtained by means of those interpolation 

 instruments (thermo-element, resistance thermometer, etc.) which measure 

 not temperature independently but a well-defined physical property which 

 changes continuously with the temperature, affords an excellent opportunity, 

 through this continuity, for the discovery of inconsistencies in the gas-ther- 

 mometer measurements. The remarkable concordance of the present series 

 of thermo-electric measurements and of the most extensive recent series of 

 resistance-thermometer measurements (Bureau of Standards), with the re- 

 cent gas-thermometer determinations made in this laboratory, serves, there- 

 fore, as an efficient and independent check upon the trustworthiness of the 

 present gas-thermometer scale between o° and 1100 . 



(10) On the density of solid substances, with especial reference to permanent changes 



produced by high pressures. John Johnston and L. H. Adams. J. Am. 

 Chem. Soc, 34, 563-584. 1912. 



With a new and improved form of pyknometer the density of salts and 

 other substances has been determined with an accuracy of 3 or 4 units in the 

 fourth decimal place, that is, within 0.02 per cent. In many cases, however, 



