178 LITERATURE OF THE SPECTROSCOPE, 



Wadsworth, F. L. 0. {Cont'd). Fixed- Arm Concave-Grating Spec- 

 troscopes. Astrophys. J. 2 (1895) 370-382. 



. The conditions of maximum efficiency in the use of 



the spectrograph. Astrophys. J. (1896) 321-347. 



. The use and mounting of the concave grating as an 



analyzing or direct comparison spectroscope. Astrophys. J. 3 

 (1896) 47-62. 



. Simple device for isolating any portion of the diffrac- 

 tion spectrum, and some notes on astronomical spectroscopes. 

 Astrophys. J. 3 (1896) 1 69-191. 



. New form of fluid prism without solid walls. Astro- 

 phys. J. 4 (1896) 274-277. 



. Note on the preparation of phosphorescent barium 



sulfide. Astrophys. J. 4 (1896) 308. 



. The Application of the Interferometer to the meas- 

 urement of small angles of refraction. Phys. Rev. 4 (1897) 480- 

 497; Beibl. (1898) 623. 



. Thermal measurements with the bolometer by the 



zero method. Astrophys. J. 5 (1897) 268-276. 



. Tables of the practical resolving power of spectro- 



scopes. Astrophys. J. 6 (1897) 27-36. 

 . The conditions of maximum efficiency in astrophoto- 



graphic work. Astrophys. J. 6 (1897) 1 19-135. 

 . Note on the effect of heat on phosphorescence. As- 



trophys. J. 6 (1897) 153-155. 

 . The resolving power of telescopes and spectroscopes 



for lines of finite width. Phil. Mag. (5) 43 (1897) 317-343; J. de 

 phys. 6 (1897) 409-425; Mem. Spettr. Ital. 26 (1897) 2-24; Ann. 

 Phys. n. F. 61 (1897) 604-630. 



. Note on the discovery of an error in the papers of 



Struve and Lord Rayleigh. Astrophys. J. 7 (1898) 77-85. 



. Notes on the use of the Grating in stellar spectro- 

 scopic work. Astrophys. J. 7 (1898) 198-207. 



Wagner, J. Die Farbe der lonen. Ztsch. phys. Chem. 12 (1893) 



314-321- 



Walden, P. Diffusionserscheinungen an Niederschlagsmembranen. 

 Ztsch. f. phys. Chem. 10 (1892) 699-732. 



Walker, J. The admissible width of the slit in interference experi- 

 ments. Phil. Mag. (5) 46 (1898) 472-478. 



. The orientation of the slit in interference experiments. 



Phil. Mag. (5) 46 (1898) 553-557; Beibl. (1899) 183. 



