462 Henry Augustus Rowland. 



the French Academy of Sciences ; the Royal Astronomical 

 Society of England ; the Royal Academy of Sciences, Berlin ; 

 the American Academy of Arts and Sciences, Boston ; the 

 National Academy of Sciences, Washington ; and the Ameri- 

 can Physical Society, of which he was the first president. 



Harry Fielding Reid. 



Johns Hopkins Univ., May 14, 1901. 



The following is a list of Professor Rowland's most impor- 

 tant papers : 



On the magnetic permeability and the maximum of magnetisation of iron, steel 

 and nickel; Phil. Mag , xlvi, August, 1873 ; reprinted in this Journal, December, 

 1873. 



On the magnetic permeability and maximum of magnetisation of nickel and 

 cobalt; Phil. Mag., xlviii. 1874. 



Studies on magnetic distribution; this Journal, x. 1875; Phil. Mag., 1, 1875. 



On the magnetic effect of convection currents: Preliminary statements : Sitzb. 

 Akad.- Berlin. 1876; Phil. Mag., ii, 1876; this Journal, xii, 1876; Ann. Chim. 

 Phys, xii, 1877. Full paper: this Journal, xv, 1878. Note: Phil. Mag., vii, 

 1879. 



Eesearch on the absolute unit of electrical resistance; this Journal, xv, 1878 ; 

 Electr. techn. Ztschr.. vi, 1885. 



On electric absorption in crystals; Am. Journ. Math., i, 1878. 



Preliminary notes on Mr. Hall's recent discovery; Am. Journ. Math., ii, 1879; 

 Phil. Mag., ix, 1880. 



On the mechanical equivalent of heat, with subsidiary researches on the varia- 

 tions of the mercury from the air-thermometer and on the variation of the specific 

 beat of water; Proc. Am. Acad. Arts and Sci., xv, 1880; published separately, 

 Boston, 1880; Prize essay of the Venetian Institute, 1881. 



Electric absorption of crystals (with E. L. Nichols); Phil. Mag., xi, 1881. 



Preliminary notice of results accomplished in the manufacture and the theory 

 of concave gratings for optical purposes; Phil. Mag., xiii, 1882; Johns Hopkins 

 Univ. Circ, 20, 1882. 



Article on the " Screw"; Encycl. Brit., 1886. 



Relative wave-lengths of the lines of the solar spectrum ; this Journal, xxxiii, 

 1887 ; Phil. Mag., xxiii, 1887. 



Table of standard wave-lengths; Johns Hopkins Univ. Circ, 73, 1889; Phil. 

 Mag., xxvii, 1889. 



On the electro-magnetic effect of convection currents (with C. T. Hutchinson) ; 

 Phil. Mag., xxvii, 1889. 



Gratings in theory and practice ; Astr. and Astr. -Phys., xii, 1893; Phil. Mag., 

 xxxv, 1893. 



A new table of standard wave-lengths: Astr. aud Astr.-Phys., xii, 1893 ; Phil. 

 Mag., xxxvi, 1893 ; also Johns Hopkins Univ. Circ, 106, 1893. 



On a table of standard wave-lengths of the spectral lines; Mem. of Amer. 

 Acad., xii, 1896. 



Electrical measurements by alternating currents; this Journal, iv, 1897; 

 Phil. Mag., xlv, 1898. 



Some new methods for the measurement of self -inductance, mutual inductance 

 and capacity (with T. D. Penniman); Johns Hopkins Univ. Circ, vol. xvii, 1898 ; 

 also this Journal, viii, 35, 1899. 



