118 



means of an improved construction of lantern microscope, which had been 

 constructed for him by Messrs Newton and Co., of Fleet Street. 



Mr. Wright said that he had devoted considerable time and attention to 

 the perfecting of the gas microscope, his part of the task being so to 

 arrange matters that adequate illumination could be passed through both 

 the objects and the lenses, and in such a way as not to impair the definition 

 of the latter. He had found considerable difficulty in obtaining suitable 

 object glasses, especially those of the higher powers, as many of those 

 which were perfectly satisfactory when used with the ordinary microscope 

 would not stand the amplification to which they were submitted in the 

 lantern. 



The object glasses used on the present occasion were a half-inch of Powell 

 and Lealand's, lent by Mr. Frank Crisp ; a half-inch of Gundlach's, lent by 

 Mr. Curties ; and an eight-tenth of Messrs. Newton's. 



The most important consideration was, however, the arrangement for the 

 management of the lime light, and this, which could only be carried out by 

 those thoroughly conversant with the peculiar conditions attending the use 

 of that mode of illumination, had been most effectually and satisfactorily 

 done by Mr. Herbert Newton, from his (Mr, Wright's) designs. 



Mr. Wright then showed various objects upon the screen, including a 

 beautiful section of the eye of a fly, magnified 1,400 diameters, and the 

 cornea of the same, 2,500 diameters ; sections of human skin, wood, and 

 echinus spines, the tongue of the blow-fly, from six to fourteen feet long, the 

 circulation in a living frog's foot, &c, &c, the sharpness and clearness of 

 definition, as well as the penetration, being in all cases remarkably good. 

 He also exhibited a number of polariscope slides, rock sections, salicine, 

 &c, with great beauty. 



Dr. Carpenter, who was present, expressed his satisfaction with the pro- 

 gress Mr. Wright had made in this direction, and pointed out the immense 

 advantages in the use, for educational purposes, of such an apparatus. 

 Attendance — Members, 63 ; visitors, 9. 



November 28th, 1884. — Ordinary Meeting. 



Dr. W. B. Carpenter, C.B., F.R.S., &c, President, in the Chair. 



The minutes of the preceding meeting were read and confirmed. 

 The following gentlemen were balloted for and duly elected members of 

 the Club :— Mr. Fredk. Bates, Mr. F. 0. Snell, Mr. P. G. Sanford, and Mr C. 

 Crisp. 



The following donations to the Club were announced : — 



" Proceedings of the Royal Society " From the Society. 



" 13th Annual Report of the South London 



Natural History Society and Field Club 

 " Transactions of the Essex Field Club " 

 " Transactions of the Norfolk and Norwich 

 Natural History Society " ... 



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