PART I. AUTHOR-INDEX. 9 1 



Langlcy,S. P. Energy and vision. Mem. Nat. Acad. 5 (1889) 

 7-18; Amer. J. Sci. (3) 36 (1888) 359-379; Phil- Mag. (5) 27 

 (1889) 1-23; Beibl. (1889) 162. 



. Observation of sudden phenomena. Amer. J. Sci. (3) 



37 (1889) 93-IOO- 

 — . The temperature of the Moon. Mem. Nat. Acad. 4 



(1889) 107-212; Amer. J. Sci. (3) 38 (1889) 421-440; Beibl. 



(1890) 783. 



. The solar and lunar spectrum. Mem. Nat. Acad. Sci. 



4 (1890) 159-179- 

 and F. W. Very. On the cheapest form of light. Amer. 



J. Sci. (3) 40 (1890) 97-113; Phil. Mag. (5) 30 (1890) 260-280; 



Beibl. (1890) 1096. 

 . Recent progress in bolometer work at the Smithsonian 



Astro- Physical Observatory. Astron. and Astrophys. 13 (1893) 



41-44; Beibl. (1894) 749. — See Smithsonian Reports, 1888-1899. 

 . Recent researches in the infra-red spectrum. Rept. 



Brit. Assoc. (1894) 465-474; C.-R. 119 (1894) 388-392; Beibl. 



(1894) 1045. 

 . The Bolometer. Amer. J. Sci. (4) 5 (1898) 241-245; 



Beibl. (1898) 399. 

 Langmuir, A. C. Index to the Literature of Didymium, 184 2-1 893. 



Smithsonian Misc. Coll. No. 972 (1894) 20 pp. 

 Lapraik, W. Die Absorptionsspectra einiger Chromverbindungen. 



J. prakt. Chem. (2) 47 (1893) 305-342; Beibl. (1893) 650. 

 Larnwr, J. Prof. Miller's observations of supernumerary rainbows. 



Cambridge Phil. Soc. Proc. 6 (1889) 281-286. 

 . The physical character of caustic surfaces. Rept. Brit. 



Assoc. (1890) 742; Beibl. (1892) 526. 

 . The dioptrics of gratings. Proc. Lond. Math. Soc. 24 



(1892-1893) 161. 

 . The significance of Wiener's Localization of the Photo- 

 graphic Action of Stationary Light-Waves. Phil. Mag. (5) 35 



(1894) 97-106. 

 . The absolute minimum of optical deviation by a prism. 



Proc. Cambridge Phil. Soc. 9 (1896) 108-110; Beibl. (1897) 628. 

 . The theory of the magnetic influence on spectra; and on 



the radiation from moving ions. Phil. Mag. (5) 44 (1897) 



503-513- 

 . Influence of pressure on spectral lines. Rept. Brit. Assoc. 



(1897) 555-556. 



