205 



Mr. Guimaraens read a paper in which he criticized the statements made 

 by Mr. Hensoldt in a paper printed in the Journal of the Club u On Fluid 

 Cavities in Meteorites." 



Mr. Hailes read the rejoinder by Mr. Hensoldt to Mr. Guimaraens' 

 remarks. 



Dr. J. D. Brown said he wished to say a word before the matter was 

 closed, as he had himself introduced Mr. Hensoldt, and knew that he had the 

 specimen referred to for a long time before he found the bubbles. The 

 section and also a portion of the Meteorite were there in the room, and if 

 they had sufficient experts present to form a small committee, he thought 

 it might be a good way of settling the question. 



Mr. Guimaraens was about to offer some further observations, when 



The President, intervening, suggested that as there seemed to be some 

 degree of personal matter mixed up with the discussion, it would be un- 

 desirable to prolong it. The appointment of a committee was hardly 

 within their province, and the question was not one upon which they felt 

 called upon to decide. 



Mr. Ingpen said that in the course of some correspondence on the sub- 

 ject there had been some doubt as to the date. He would therefore state 

 that it should have been March 19, 1878, and not 1879, as originally stated. 



The President, on appeal to the feelings of the members on the subject, 

 decided to close the discussion, and votes of thanks to Dr. Cobbold, Mr. 

 Guimaraens, and Mr. Hailes for their communications, were unanimously 

 carried. 



Attendance — Members, 70 ; Visitors, 5. 



December 8th, 1882. — Conversational Meeting. 



A demonstration was given in one of the class rooms by Mr. J. W. Groves, 

 F.R.M.8., on "The History of a Stained Section of an Animal Structure." 

 Commencing with the material, which he said should be obtained as fresh as 

 possible, Mr. Groves passed rapidly through the various stages of preparing 

 the specimen, carrying out as far as practicable the whole process before the 

 meeting. 



The first step was, he explained, to properly harden the specimen. Many 

 people failed in this, either by putting the fresh material into too strong a 

 fluid, which hardened the surface without penetrating, or they did not get 

 the material sufficiently fresh, and which had therefore undergone morbid 

 changes before being placed in the preserving fluid. Again, with too large a 

 lump of material the outside alone would be hardened. 



Mr. Groves then described the various hardening media and the proper 

 strengths of each. The material he said should not be placed at once in 

 strong alcohol, but first in say 65° for 24 hours, then transferred to stronger. 

 The hardening fluid should be changed frequently — at the end of a fort- 



