20 PROCEEDINGS OF THE CANADIAN INSTITUTE. 



have for steel engravings and prints to paintings. This is false to the 

 principles and teachings of nature. Those who favour engravings do- 

 so honestly beca^^se of their training in black and white, to which 

 from childhood they have become accustomed. The children, of the 

 Quaker City had seen tlie sombre attire of their parents and even, 

 worn the same themselves, their city surroundings show the white 

 marble residences and the black roadway, their books and writing 

 are all black and white. Nature punishes all infringements of her 

 laws ; in this, as in other cases, the old truth holds good, " Be sure 

 your sin will find you out." Mr. Sherwood concluded his paper, 

 which was amply illustrated with diagrams, by a glowing description 

 of an August sunset. "The day," said he, ''is i-ich in colour, and 

 after night spreads her mantle o'er the scene other worlds take up 

 the colour which for the time we have lost. What is more glorious 

 than colour'? It is God's handiwork, and, like himself, is ])ei'fect. 

 The representations of heaven are full of colour, and with more of 

 colour in our dailv surroundings life would be more cheerful." 



THIRTEENTH MEETING. 



Thirteenth Meeting, 9th February, 1889, the President in. 

 the chair. 



Donations and Exchanges since last meeting, 69. 



Mr. Daniel Lamb was elected a member. 



Dr. G. Sterling Ryerson, read a paper on " Colour-BIindness 

 in its Relation to Railway Employes and the Public." 



Dr. Ryerson said that students of colour-blindness adopted the 

 Young-Helmholz theory of colour as the simplest to work with, 

 though much light had been thrown upon the subject by Seebruck 

 and Stilling, of Germany, Prof. Wilson, of Edinbui'gh, and others. 

 The theoiy of Helmholz was that there were three optic nerves or 

 fibres, one for red, one for green, and a third for violet. Colour- 



