Report of the Committee on Colour-Vision. 



357 



LETTERS RECEIVED BY THE COMMITTEE BEARING ON 

 THE ENQUIRY. 



v 7680 « Pall Mall, 



°" 1602 " 27th May, 1890. 



" Sir, — I am directed by the Secretary of State for War to 

 acknowledge the receipt of your letter of 20th instant, and to 

 acquaint you in reply, that tests for Colour Vision are invariably 

 used in the case of all candidates presenting themselves for 

 Commissions in Her Majesty's Service. 



" Holmgren's wools being the most convenient, are employed 

 in a systematic manner to detect any defect. 



"The plan consists in making the candidate match certain test 

 colours from the heap of wools. 



" I am to add that recruits are not tested for Colour Vision. 



" I have the honour to be, Sir, 



" Your obedient Servant, 



" Ralph Thompson. 



" The Secretary to the Committee, 



" Science and Art Department, 



" South Kensington." 



« v 7680 " Pall Mall, 



°" 1604 " June, 1890. 



" Sir, — I am directed by the Secretary of State for War to 

 acknowledge your letter of 2nd instant, and in reply to acquaint 

 you that there are no statistics regarding Colour Blindness com- 

 piled in this Department. 



" I have the honour to be, Sir, 



" Your obedient Servant, 



" Ralph Thompson. 



" The Secretary to the Committee, 

 " The Royal Society, 



"Burlington House, W." 



