41 



magnified photomicrograph was shown upon a large screen with 

 the lantern, the original 1000 diameters was easily increased 

 twenty or thirty times. 



Mr. Goodwin said that n trying some experiments with his 

 Httle lamp, he had tried to fill the field with light without using 

 a bull's-eye condenser, and he had adopted a method of adding a 

 small lens to the ordinary combination of the substage condenser. 

 By this means he had been enabled to bring the lamp within 3 " 

 of the back combination of the substage condenser, and in this 

 way he got a full field of light without in any way impairing the 

 definition. He thought this plan was worth the attention of 

 those who wanted to make the best of their appliances. 



Mr. E. M. Nelson said Mr. Goodwin showed him this con- 

 trivance ; and having tried it, he got one made like it for himself, 

 and although he could not say that he had exhaustively tested it, 

 he had used it sufiiciently to be assured of its merits. In the 

 ordinary way the lamp must be placed at about 8" from the back 

 lens of the condenser to get the best effects. Mr. Goodwin's plan 

 was to place a plano-convex lens of 5-inch focus in the screen 

 holder of the condenser, which enabled him to bring the lamp 

 up closer — namely, to 3" instead of 8'' : this gave a great increase 

 to the intensity of the light, which was a matter of great im- 

 portance when high powers were being used. He thought it was 

 a very simple idea, and one capable of development. 



Mr. George Massee then gave an interesting account of the 

 evolution of the Basidiomycetes, which he illustrated by a fine 

 series of coloured diagrams, and by drawings on the board. 



The President invited remarks upon this most interesting com- 

 munication from Mr. Massee upon a most important subject. 



Mr. E. T. Newton expressed his regret that the botanists, if any 

 were present, had not favoured them with any observations, but 

 he thought he might say for the others that they had come into the 

 room that evening to have many erroneous notions on the subject 

 dispelled and to have quite a new field opened up to them. He 

 thought those who were present would feel w^ith him their 

 indebtedness to Mr. Massee for giving them so much of his 

 valuable time, and would express the great satisfaction derived 

 from hearing his very interesting remarks. Eor his own part it 

 had quite reminded him of the old days of the Club, when Dr. M. 

 C. Cooke used to come down and give them his talks about fungi. 



