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N</o on the progress of experiments for comparing a wave-length with a 

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Peirco (C. S.). Amcr. Jour. Sci., (8) 18. r >l ; Beiblatter, 3, 711 (Abs.). 



The ghosts in Rutherford's diffraction speef'um. 



Peiroe (U. S.). Amcr. Jour. Mathematics, 2, 880-47 ; Nature, 20 j 



(Abs.); Beiblatter, 5, 48-50 (Abs.). 



Photometric Researches. 



Pickering (W. II.). Proc. Amor. Acad., 15, 236-50; Beiblatter, 4, 7-Jm 



(Abs.). 



Photometrische Untersuchungen. 



Pulfrich (0.). Ann. Phys. u. Chem., n. F. 14. 177-218; A>mer. Jour. 

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Tableau de conversion de l'echelle spectrale en longueurs d'onde. 

 Salet (G.). Bull. Soc. chim. Paris, n. b. 27. 482 



On the relative wave-lengths of the lines of the solar spectrum. 

 Rowland (Henry A.). Phil. Mag., (6) 23 (1887), 267. 



Three years' experimenting in mensurationaJ spectroscopy" 

 Smyth (Piaxzi). Nature, 22, 198 5, 222 5. 



Memoire sur la determination des longueurs d'onde des raies m6talliquee, 

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 i With a plate giving the lines and wave-lengths of forty-fivi 

 metals. ) 



Thalen (Bob.). Ann. Chim. et Phys., (4) 18,202; N • . A • i i; .. 

 Boo. 8 si. (Jpsala, (8) 6. 



L mgueur d'onde des bandes Bpectrales donnees par l< - compost du carbone. 

 Thollon (L.). Comptei Rendus, 93. 260; Ann. Chim et Phyi 

 25 



ihotom&riques. duns les differentes n gions du Bpectre. 

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Photometrie der sfeaunhorer Linien. 



Vit rdt K . Ann. Phys. u. Chem., n. P. 13. 888-46. 



