188 Photometry of Lights of Different Colours. 



Table III. 



Mean Flicker Luminosity Curve for Five Observers. 

 Reduced to Equal Energy Spectrum. 



X. 





653 



106 



643 



19-5 



632 



28-8 



622 



402 



612 



52-8 



593 



78-7 



574 



1000 



555 



1110 



545 



1120 



535 



1110 



526 



99-7 



517 



76-7 



Partial Bibliography. 



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1888, p. 547. 

 Dow, Phil. Mag. Aug. 1906, p. 120, " Colour Phenomena in Photo- 

 metry." 



Phil. Mag. Jan. 1910, p. 58, "Physiological Principles underlying 

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p. 144, " Ueber den Helligkeitswerth der Spectralfarben bei 

 verschiedener absoluter Intensitat." 



p. 378, " Die Abhangigkeit der Sehscharfe von der Beleuchtungs- 

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Light Assn., 1907 Convention, vol. i. p. 327. 

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 Millar, Trans, of Ilium. Eng. Soc, Nov. 1909, p. 769. 

 Morris-Airey, Journal of Inst, of Electrical Engineers, Feb. 1910, 



p. 177. 

 Nutting, Bull. Bureau of Standards, vol. v. p. 261. 

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 Rood, Silliman's Journal, (3) xlvi. p. 173, 1893; (4) viii. p. 194, 



1899. 

 Stuhr, " Ueber die Bestimmung des Aquivalenzwertes verschieden- 



farbiger Lichtquellen." Erlangen dissertation 

 Tufts, Phys Rev. vol. xxv. Dec. 1907, p. 433, " Spectrophotometry of 



Normal and Colour-blind Eyes." 

 Whitman, Phys. Rev. iii. p. 241, 1895. 

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Electrician, July 16, 1909. 



