26 THE RUMFORD FUND 



SCHWARTZ, WILLIAM H. Effect of Distance on Appreciation of 

 Color, xv, 229. 1879. 



TROWBRIDGE, JOHN. Simple Apparatus for Illustrating Periodic 

 Motion, xv, 232. 1879. 



TROWBRIDGE, JOHN. Illustration of the Conservation of Energv, 

 xv, 235. 1879. 



PICKERING, WILLIAM H. Photometric Researches, xv, 236. 1880. 



PICKERING, EDWARD C. Dimensions of the Fixed Stars, with espe- 

 cial reference to Binaries and Variables of the Algol Type, xvi, 

 1. 1880. 



ROWLAND, HENRY A. Appendix to Paper on the Mechanical 

 Equivalent of Heat, containing the Comparison with Dr. Joule's 

 Thermometer, xvi, 38. 1880. 



HASTINGS, CHARLES S. A Theory of the Constitution of the Sun 

 founded upon Spectroscopic Observations original and other, xvi, 

 140. 1880. 



DRAPER, JOHN W. On the Phosphorograph of a Solar Spectrum, 

 and on the Lines in its Infra-red Region, xvi, 223. 1880. 



PICKERING, EDWARD C. Variable Stars of Short Period, xvi, 257. 

 1881. 



LANGLEY, SAMUEL P. The Bolometer and Radiant Energy, xvi, 

 342. 1881. 



TODD, DAVID P. On the Use of the Electric Telegraph during 

 Total Solar Eclipses, xvi, 359. 1881. 



PICKERING, EDWARD C., Director, SEA RLE, ARTHUR, and WENDELL, 

 OLIVER C., Assistants. Photometric Measurements of the Vari- 

 able Stars ft Persei and DM. 81 25, made at the Harvard Col- 

 lege Observatory, xvi, 370. 1881. 



WINLOCK, WILLIAM C. On the Group "b" in the Solar Spectrum, 

 xvi., 398. 1880. 



HUNTINGTON, OLIVER W. On the Spectrum of Arsenic, xvii, 35. 

 1881. 



PENROSE, CHARLES B. Thermo-electricity. Peltier and Thomson 

 Effects, xvii, 39. 1881. 



