Report of the Committee on Colour- Vision. 371 



First experiment made on the 20th (clear-weather) September, 

 the 17th year of Meiji (1884), from 9.5 a.m. to 5 p.m. 



Numher of persons examined — ■ 



600 soldiers of the First Regiment of Infantry of the 

 Tokio garrison. 



Place of experiment — 



A room in the Hospital of the First Regiment of Infantry. 



Examiner — 



Medical Officer of a Swedish man-of-war. 



Assistants — 



Taniguchi Ken, 2nd-class Surgeon of the Imperial 'Army ; 

 Ume Kinnojo, in the service of the Tokio University. 



Mode of experiment — 



Trials with woollen yarns. 



Results. 



Red colour-blind . . . . 12 



Green „ . . . . 4 



Incomplete „ . . . . 5 



Weak colour- vision . . . . 15 



Total 36 



Second experiment made on the 22nd (clear weather) September, 

 the 17th year of Meiji (1884) from 8.30 a.m. to 4 p.m. 



Number of persons examined — 



600 soldiers of the Third Regiment of Infantry of the 

 Tokio garrison. 



Place of experiment — 



A room of the Hospital of the Third Regiment of Infantry. 



Examiners and mode of experiment — 



The same as in the previous experiment. 



Results. 



Red colour-blind . . . . 7 



Green „ . . . . 6 



Incomplete „ . . . . 7 



Weak colour- vision . . . . 12 



Total 32 



