258 Minutes of Meeting. 



are extremely pleasing, and the effects are perhaps enhanced if, instead of 

 three colours being fixed on the top, there are only two, and these 

 nearly complementary to each other, such as green and crimson, blue 

 and orange, or violet and yellow. Further, if gray is substituted for one 

 of the colours, the other being moderately brilhant, the gray becomes 

 apparently charged with the colour complementary to the other colour. 

 The complementary colours are brought out very strongly in this way. 

 The writer having now described the more remarkable of his experi- 

 ments, would observe that he thinks they furnish valuable materials for 

 testing theories relating to colour-vision. He has not, however, as yet 

 been able to make much use of them in this way beyond rendering 

 himself dissatisfied with all such theories with which he is acquainted. 



Novemher, 30. — Me. Alex. Harvey, Vice-President, in the Chair. 



George Blair, M.A., was elected a member of the Societ}'. 



Professor William Thomson reported that the Committee appointed 

 at last meeting to prepare a plan for the fortnightly publication of the 

 Proceedings had agreed to the following regulations : — 



Eegulations adopted, November 30, 1859, with reference to the 

 publication of Proceedings and the election of honorary members : — 



1. A printed account of each meeting, except the last of the session, 

 shall be circulated among all members of the Society, along with the 

 billet summoning the next ensuing meeting. 



2. Authors and speakers who wish accounts of their communications 

 to be printed, shall furnish abstracts to the Secretary, with sketches 

 of illustrative diagrams, when such are requned, not later than the end 

 of the week in which the meeting was held. 



3. Full discretion to deal with matter thus supplied, and to complete 

 the account of the meeting in the time for circulation within the pei-iod 

 specified, shall be allowed to an Editorial Committee, consisting of the 

 Secretary, President, and one other member of Council. 



4. Papers too long to be published in the ordinary fortnightly Report, 

 can only appear in the Proceedings by an express order of the Council ; 

 and, when so ordered, shall be published in a supplementary number, to 

 be circulated along with the account of the last meeting of the session, 

 within a fortnight of the date of that meeting. 



5. Duplicate copies of the Eeports of all the meetings, except the 

 last of the session, shall be printed and sewed up along with the Report 

 of the last meeting, in the supplementary number, so as to form a 

 complete Report for the session, which shall be circulated among all 



