ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 265' 



Nitrogen Thermometer.*— A. L. Day and R. B. Sosman have com- 

 pleted the work of extending the gas scale of absolute temperature to 

 1550° C. The errors in temperature measurement with the nitrogen 

 thermometer have been reduced to about one-fourth of their former 

 magnitude. Much information is given as to the use of melting and 

 freezing points of metals as fixed points. 1755° C. is arrived at by an 

 indirect method as the melting-point of platinum. A table of melting- 

 points of metals, etc., is given. 



Bauer, 0. — Appearance of Fractures and Quality of Materials. 



Stahl und Eisen, xxix. (1909) pp. 1338-40 (3 figs.). 



Belloc, G. — Emission of Gas by Heated Metals. 



Comptes Rendus, cxlix. (1909) pp. 672-3. 



Benedicks, C. — A New Form of Pearlite. 



Metallurgie, vi. (1909) pp. 567-8 (4 figs.). 

 See also this Journal 1909, p. 407. 



Coste, M. — Transformations of Selenium. 



Comptes Rendus, cxlix. (1909) pp. 674-6. 



Froitzheim, C— Influence of Light on the Texture of Iron and Steel. 



Staid und Eisen, xxix. (1909) p. 2022. 



Gulliver, G. H.— A New Experimental Method of Investigating certain Systems 

 of Stress. Proc. Roy. Soc. Edin., xxx. (1909) pp. 38-45 (1 fig.). 



Janecke, E. — .Isomorphous Ternary Mixtures. 



Zeitschr. Phys. Ghem., lxvii. (1909) pp. 641-88 (70 figs.). 



Heyn, E. & others. — Copper-ammonium Chloride Etching Method of Macro- 

 scopic Testing. 



[The practical application of the method is discussed by E. Heyn, A. v. 

 Dorrnus, L. Kruft and M. Widernann.] 



Stahl und Eisen, xxviii. (1908) p. 1827 ; 

 xxix. (1909) pp. 356-8, 517-8, 907-8, 1823-4. 



Neumann, 0. — Diamonds in Iron. 



Zeitschr. Elektrochem., xv. (1909) pp. 817-20. 



Pawlow, P. — Dependence of Melting-point on the Surface-energy of a Solid Body. 



Zeitschr. Phys. Ghem., lxv. (1908) pp. 1-35, 545-8 (11 figs.). 



Pelabon, H.— Mixtures of Sulphur, Selenium, and Tellurium with Metals. 



Ann. Ghim. Phijs., xvii. (1909) pp. 526-66. 



Ross, A. D. & R. C. Gray and F. Heusler & P. Richarz. — Magnetic 

 Properties of Alloys of Manganese, Aluminium, and Copper. 



Zeitschr. Anorg. Ghem., lxiii. (1909) pp. 349-52 ; lxv. (1909) pp. 110-12. 



Ruer, R. — Ternary Systems. 



Zeitschr. Phijs. Chem., lxviii. (1909) pp. 1-31 (4 figs.). 



Schenck, R. — Departure from Wiedemann-Franz Law in Solid Metal Solutions. 



Metallurgie, vi. (1909) pp. 550-3 (3 figs.). 



Stern, E— Microstructure of Portland Cement. 



Zeitschr. Anorg. Chem., lxiii. (1909) pp. 160-7 (17 figs.). 



Tammann, G. — Chemical Eelationship of Metals and the Constitution of Alloys. 



Stahl und Eisen, xxix. (1909) pp. 1084-5 (1 fig.). 



* Amer. Journ. Sci., xxix. (1910) pp. 93-161 (6 figs.). 

 April 20th, 1910 



