BIBLIOGRAPHY 685 



49. Gratings in Theory and Practice. 



Philosophical Magazine (5), XXXV, 397-419, 1893. 

 Astronomy and Astro-Physics, XII, 129-149, 1893. 



50. A New Table of Standard Wave-lengths. 



Philosophical Magazine (5), XXXVI, 49-75, 1893. 



Astronomy and Astro-Physics, XII, 321-347, 1893. 



Johns Hopkins University Circulars No. 106, p. 110, 1893. 



51. On a Table of Standard Wave-lengths of the Spectral Lines. 



Memoirs of the American Academy of Arts and Sciences, XII, 101- 

 186, 1896. 



52. The Separation of the Bare Earths. 



Johns Hopkins University Circulars No. 112, pp. 73, 74, 1894. 



53. Modern Theories as to Electricity. 



The Engineering Magazine, VIII, 589-596, 1895. 



54. A Preliminary Table of Solar Spectrum Wave-lengths. 



Astrophysical Journal, I-V, 1895-1897. 



55. Corrections and Additions to Professor H. A. Rowland's Table of 



Solar Spectrum Wave-lengths. 

 Astrophysical Journal VI, 384-392, 1897. 



56. The Arc-Spectra of the Elements. I. Boron and Beryllium. II. 



Germanium. III. Platinum and Osmium. IV. Rhodium, Ru- 

 thenium and Palladium. By II. A. Rowland and R. R. Tatnall. 

 Astrophysical Journal, I, 14-17, 149-153, 1895; II, 184-187, 1895; m, 

 286-291, 1896. 



57. Notes of Observations on the Rontgen Rays. By H. A. Rowland, 



N. R. Carmichael and L. J. Briggs. 



American Journal of Science (4), I, 247, 248, 1896. 



Philosophical Magazine (5), XLI, 381-382, 1896. 



58. Notes on Rontgen Rays. By H. A. Rowland, N. R. Carmichael and 



L. J. Briggs. 

 Electrical World, XXVII, 452, 1896. 



59. The Rontgen Ray and its Relation to Physics. 



Transactions of the American Institute of Electrical Engineers, 

 XIII, 403-410, 430, 431, 1896. 



60. Electrical Measurement by Alternating Currents. 



American Journal of Science (4), IV, 429-448, 1897. 

 Philosophical Magazine (5), XLV, 66-85, 1898. 



61. Arc-Spectra of Vanadium, Zirconium and Lanthanum. By H. A. 



Rowland and C. N. Harrison. 



Astrophysical Journal, VII, 273-294, 373-389, 1898. 



