PROCEEDINGS OF THE SOCIETY. 645 



test-piece of steel while under the strain of a testinj^ machine. It was 

 ilhiminated by an arc lamp, and the observation made by direct means or 

 by projection on a screen at a distance of about 6 ft. The testing 

 machine could be either vertical or horizontal, and the Microscope was 

 set towards it. As the metal was stretched it became thinner, and the 

 object of this Microscope was to follow the whole process and ol)serve 

 the chancres that took place. 



Mr. Rheinberg asked what the approximate power of the Microscope 

 was ? 



Mr. Watson Baker replied that with an objective of § in. and an eye- 

 piece of about 6, it would be about 450 diam. on the screen. 



The President, in according the vote of thanks to 'Mr. Baker for his 

 demonstration, said that all would, he was sure, look forward with great 

 interest to Mr. Watson Baker's promised practical demonstration of his 

 apparatus. 



Mr. Conrad Beck exhibited a series of slides of Coumarin, which had 

 been prepared and submitted by Mr. G. M. Beaumont. 



The thanks of the Society were unanimously voted to Mr. Beaumont 

 for his new preparations, and to Mr. Conrad Beck for bringing them 

 to the notice of the Society. 



A paper by Mr. F. W. Chapman, F.R.M.S., "Notes on the Shell- 

 structure in the Genus Lingula^ Recent and Fossil," was next placed 

 l)efore the Meeting by Dr. Shillington Scales. As the paper was of 

 some length, and contained many interesting illustrations and diagrams, 

 Dr. Scales asked permission to read merely the summary that evening. 

 The paper in its entirety would be published in the Journal, where 

 it could be studied, and better understood than if it were read in full 

 by him that evening. 



A very cordial vote of thanks to Mr. Chapman for his paper was 

 carried unanimouslv. 



A paper by Mr. J. C. Kershaw, on "The Development of an 

 Embiid," was read in full by Dr. Shillington Scales. 



The President said he thought that all would agree with him that 

 they had seldom heard a more lucid and terse description of a develop- 

 mental process than that contained in Mr. Kershaw's paper. The whole 

 process was brought to one's mind extremely clearly, and he was very 

 delighted to have heard a paper in which so nuich information had been 

 given so easily and concisely. 



Dr. Shillington Scales said that from a biological and developmental 

 point of view, Mr. Kershaw had performed a very careful piece of 

 research : the data were carefully given, and the whole process had 

 evidently been closely watched. 



The President proposed a very hearty vote of thanks to the author 

 of the paper for the care and lucidity with which he had placed his 

 observations before the Society. 



This was carried with acclamation. 



