216 E. B. TITCHENER— ETHNOLOGICAL TESTS OF SENSATION. 



is stated with becoming caution. The conchision is " that the color 

 vision of the Papuan is characterized by a certain degree of insensi- 

 tiveness to bkie (and probably green) as compared with that of 

 Europeans. "^^ I do not think that the observations made warrant 

 the inference drawn from them; and I therefore take up the cudgels 

 on behalf of the Papuan. To avoid overmuch detail I confine my- 

 self strictly to Rivers' report; I deal with the major question of 

 blue, and leave green out of account; and I consider only the obser- 

 vations taken on Murray Island. 



The quantitative work was done with Lovibond's tintometer. 

 " The essential part of the instrument consists of three series of col- 

 ored glasses, red, yellow and blue, very delicately graded so that each 

 forms a series by means of which one passes from a color so faint 

 as to be indistinguishable from colorless glass up to a glass of a high 

 degree of saturation. "^^ The results, stated in terms of the unit of 

 the instrument, are as follows •}'^ 



R. 



B. 



17 Murray Islanders. 



18 Englishmen 



I7.6± 7.66 

 3i.7±22.5 



26.s±9-7i 

 20.5=b8.ii 



6o.o±i6.5 

 36.4i15.13 



Rivers has excluded from his Murray averages the results found with 

 one boy who probably suffered from " a slight degree of photopho- 

 bia."-** He includes in the English averages the results of four ob- 

 servers who were " exceptionally insensitive to red " and of two who 

 were "insensitive to blue."^^ If we ourselves exclude these cases, 

 we get the revised figures : 



Englishmen (14) 18.0 + 5.5 (18) 20.5 + 8.1 1 (16) 34.1 + 13.66 



The exclusion of the defective subjects brings the averages into 

 closer accordance with Rivers' theory ; and for that very reason he 



" R, 94. 



18 R, 70 f. Various forms and uses of the tintometer are discussed by 

 J. W. Lovibond, " Measurement of Light and Color Sensations," 1893. I am 

 not familiar with the instrument, and Lovibond's description is, unfortunately, 

 not always full. The yellow glasses " have a distinctly greenish tinge " and 

 the red glasses are " distinctly bluish " (R, 71, 74 f.). 



19 R, 72. 



" R, 7i. 



