Iibstratt af papers anb ot^er ^rnteebings 



OF THE 



LEEDS NATURALISTS' CLUB AND SCIENTIFIC 

 ASSOCIATION. 



1890. 



Meeting held in the Library of the Philosophical Hall, February 3rd, 

 1890. Arthur Smithells, B.Sc, F.I.C. (Vice-President), in the chair. 



THE president's ADDRESS. 



THE HUMAX BRAIN. 



PROFESSOR DE BURGH BIRCH, M.D., CM., F.R.S.E. 



A description was given of the brain of the lower animals where the 

 development is very rudimentary. The first drawing shown upon the 

 screen was that of the brain of a carp, which exhibited two bulbs, 

 comprising nearly the whole brain, and whose functions belong to the 

 sense of sight. Then followed a large and unique set of slides showing 

 the gradual development of the brain in the animal kingdom, irom the 

 very simple to the most complex of all, viz., the human. Among the 

 drawings shown were the brains of the frog, pigeon, guinea pig, rabbit, 

 dog, jackal, and ape. The chief features were explained as they occurred. 

 The topography of the human brain was next considered, and the functions 

 and their location were briefly shown. Several of the demonstrations and 

 expei'iments of the authorities on the human braia were also recounted. 

 The physiological structure was pointed out, and the great difi'ereutiation 

 of various portions. The addi-ess was illustrated throughout by lantern 

 slides, drawings, and specimens, and was thoroughly practical, and 

 rendered in a most instructive and interesting way, greatly to the 

 appreciation of those present. 



Meeting held in Boom No. 80, Municipal Buildings, February 10th, 

 1890. John Stubbins, F.G.S., F.E.M.S. (Vice-President), in the chair. 



ON THE PREPARATION AND MOUNTING OF MICROSCOPIC OBJECTS. 

 W. CLAPHAM. 



It was pointed out that this subject was almost an unlimited one, as 

 most objects require some special treatment, and that it would be quite 

 impossible — in one evening — to take more than one class of microscopic 

 objects. Therefore the attention of members was directed to the epidermis 



