PROCEEDINGS OF THE SOCIETY. 1007 



put upon it by this very severe test of its capabilities. The best 

 1/2-mch objective of many which he had tried was one by Powell & 

 Lealand, which Mr. Crisp had lent him, and which worked in a most 

 admirable manner. An objective of similar power by Gundlach had 

 also been lent him by Mr. Curties, and the excellent qualities of this lens 

 were brought out m a very remarkable degree. He was also greatly 

 indebted to Mr. Topping and others for the specially beautiful slides 

 which had been placed at his disposal, and which he proposed to ex- 

 hibit, together with some prepared by Dr. Carpenter. The lishts 

 being lowered, ° 



_ Mr. Wright then exhibited upon a screen the followin<^ series of 

 objects, commencing with those of large size under a comparatively 

 low power, and afterwards employing an 8/10 in., and the 1/2 in 

 objectives referred to, both with and without amplifiers. It was 

 specially remarked that the images were shown with perfect sharpness 

 ot defanition up to the very margin of the field : -^'corpion-fly • larva 

 of vapourer moth; wood of elm; hand of monkey; human thumb- 

 kidney, double-stained and injected; foot of Dytiscus ; eye of dune 

 fly ; human tongue ; cat's tongue ; brain ; EcMnus spine (3) ; intestine 

 f ft; coiled palate of limpet; tongue of blow-fly; circulation in 

 toot oi living frog. 



At the conclusion of the exhibition, which prolonged the meeting 

 to a later hour than usual, but appeared to give great satisfaction to 

 the large number of Fellows present, 



f ^?lt^ President said that no doubt most of them had at some time 

 telt the need of means by which they might be able to project obiects 

 with some degree of clear definition, and he was himself very thank- 

 lul lor the progress which had been made by Mr. Wright in this 

 direction. He thought the successful results of Mr. Wright's efforts 

 pointed to the attainment of even still greater success in the future 

 TIT w . , rP.^''*f^ ^"""^ great pleasure in moving a vote of thanks 'to 

 Mr. Wright tor his very interesting exhibition. He had been in com- 

 munication with him during the progress of his experiments, and had 

 been much pleased to see how great the success had been. He had 

 never seen such definition at any exJiibition of the kind before For 

 educational purposes, it was a matter of great importance and value 

 to be able to show the real objects in this way. 



Prof. Stewart said that what they had seen had been shown in 

 such a really sharp and excellent manner that Mr. Wright was to be 

 much congratulated upon his success, and the more especially so that 

 most oi the objects which had been exhibited in such an exceedin'^lv 

 satistactoiy way had not been prepared for the purpose. "^ 



Mr Michael said tliat the exhibition was a great step in advance 

 ot anything which had hitlierto been accomplished. Although tho 

 perfection of detail brought out might not equal the definition 

 under an ordinary Microscope it was of the greatest value in enabling 

 any one to shovv objects with such perfection to a largo audience at 

 onc^mo lie had great pleasure in seconding tlio vote of thanks 

 TIT «r'- w**^' '^'^V^ *^'"' ''''' improvement in definition obtained bv 

 Mr. Wright over tliat of the " Giant Electric Microscope " exhibited last 



