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21. Beitriige zur Geognosie und Miner- 



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22. TJeber die geologischeii Verhiiltnisse 



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 Pickering, Edward Charles. To references in 



No. 14 ( Vol. 8) add Annal. Phys. Chem., Ergauz., 



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17. Measurements of the polarization of 



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18. Graphical integration. Amer. Acad. 



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20. Height and velocity of clouds. Amer. 



Acad. Proc., 11, 1876, pp. 263-264. 



21. Comparison of prismatic and diffrac- 

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22. A nebula-photometer. Amer. Journ. 



Sci., 11, 1876, pp. 482-483. 



23. Stellar magnitudes ; a request to 



7 [PIC 



Pickering, Edward Charles. 28. Dimensions 

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29. Variable stars of short period. Anier. 



Acad. Proc., 16, 1881, pp. 257-284. 



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31. Observations of Cornet ill. 1869. 



Astr. Nachr., 99, 1881, col. 95-96. 



32. [Measurements of the companion of 



Sinus.] Astr. Nachr., 99, 1881, col. 219-222. 



33. [Objects remarkable for their colors 



astronomers. Astron. Soc. Month. Not., 39, 

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24. New planetary nebulae. Amer. Journ. 



Sci., 20, 1880, pp. 303-305. 



25. Observations of the satellites of Mars, 



made at the Harvard College Observatory. Astr. 

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26. Light of WEBB'S planetary nebula 



(DM.+ 414004). Nature, 21, 1880, pp. 346- 

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27. Two new planetary nebulae. Nature, 



22, 1880, pp. 327-328. 



E. S. XI. 



or spectra, found at the Astronomical Observa- 

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34. The wedge photometer. Amer. Acad. 



Proc., 17, 1882, pp. 231-233 ; Nature, 26, 1882, 

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35. The meridian photometer. Astron. Soc. 



Month. Not., 42, 1882, pp. 365-367. 



36. Observations and elements of BAR- 

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 col. 57-60. 



37. Photometric observations of the satel- 

 lites of Mars, made at the Harvard College 

 Observatory 1881-82. Astr. Nachr., 102, 1882, 

 col. 193-196. 



38. Photometric measurements of SAW- 

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 stars. Astr. Nachr., 103, 1882, col. 61-64. 



39. New planetary uebuhe. Astr. Nachr., 



103, 1882, col. 95-96. 



4O. Photometric revision of the Durch- 



musterung. Leipzig, Astron. Gesell. Viertelj., 

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41. Observations of the transit of Venus, 



December 5 and 6, 1882, made at the Harvard 



College Observatory. Amer. Acad. Proc., 18, 



1883, pp. 15-40. 

 Pickering, Edward Charles, <fc Strange, D. P. 



Light absorbed by the atmosphere of the Sun. 



Amer. Acad. Proc., 10, 1875, pp. 428-432. 

 2. Tests of a magneto-electric ma- 

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445. 

 Pickering, Edward Charles, & Williams, Chas. 



II Foci of lenses placed obliquely. Amer. 



Acad. Proc., 10, 1875, pp. 300-307. 

 Pickering, Edward Charles, Searle, Arthur, & 



Wendell, 0. C. Photometric measurements of 



the variable stars /3 Persei and DM. 8125, made 



at the Harvard College Observatory. Amer. 



Acad. Proc., 16, 1881, pp. 370-397. 

 Pickering, Spencer Percival Umfreville. The 



action of sulphuric acid on copper. Chem. Soc. 



Journ., 33, 1878, pp. 112-139; Moniteur Scien- 



tifique, 21, 1879, pp. 588-608. 



3 



