684 HENRY A. ROWLAND 



37. On the Value of the Ohm. 



La Lumiere Electrique, XXVI, pp. 188, 477, 1887. 



38. On a Simple and Convenient Form of Water-battery. 



American Journal of Science (3), XXXIII, 147, 1887. 



Philosophical Magazine (5), XXIII, 303, 1887. 



Johns Hopkins University Circulars No. 57, p. 80, 1887. 



39. On the Eelative Wave-lengths of the Lines of the Solar Spectrum. 



American Journal of Science (3), XXXIII, 182-190, 1887. 

 Philosophical Magazine (5), XXIII, 257-265, 1887. 



40. On an Explanation of the Action of a Magnet on Chemical Action. 



By H. A. Eowland and Louis Bell. 

 American Journal of Science (3), XXXVI, 39-47, 1888. 

 Philosophical Magazine (5), XXVI, 105-114, 1888. 



41. Table of Standard Wave-lengths. 



Philosophical Magazine (5), XXVII, 479-484, 1889. 

 Johns Hopkins University Circulars No. 73, p. 69, 1889. 



42. A Few Notes on the Use of Gratings. 



Johns Hopkins University Circulars No. 73, pp. 73, 74, 1889. 



43. On the Electro-magnetic Effect of Convection-Currents. By H. A. 



Rowland and C. T. Ilutchinson. 

 Philosophical Magazine (5), XXVII, 445-460, 1889. 



44. On the Ratio of the Electro-static to the Electro-magnetic Unit of 



Electricity. By H. A. Rowland, E. H. Hall, and L. B. Fletcher. 

 American Journal of Science (3), XXXVIII, 289-298, 1889. 

 Philosophical Magazine (5), XXVIII, 304-315, 1889. 



45. Electro-magnetic Waves and Oscillations at the Surface of Con- 



ductors. 

 American Journal of Mathematics, XI, 373-387, 1889. 



46. Report of Progress in Spectrum Work. 



The Chemical News, LXIII, 133, 1891. 



Johns Hopkins University Circulars No. 85, pp. 41, 42, 1891. 



American Journal of Science (3), XLI, 243, 244, 1891. 



47. Notes on the Theory of the Transformer. 



Philosophical Magazine (5), XXXIV, 54-57, 1892. 



Electrical World XX, 20, 1892. 



Johns Hopkins University Circulars No. 99, pp. 104, 105, 1892. 



48. Notes on the Effect of Harmonics in the Transmission of Power by 



Alternating Currents. 

 Electrical World, XX, 368, 1892. 

 La Lumiere Electrique, XLVII, 42-44, 1893. 



