67 



« Proceedings of the Belgian Microscopical") frQm fche Societj- 

 Society" ... ... ••• ... ) 



"The Octopus," by Mr. Henry Lee ... „ the Author. 



" Thudichuni's Manual of Chemical Phy-~) Mr jTeeman. 



siology'' ... ... ) 



" Brongniart's Mineralogy " „ Mr. M. H.Johnson. 



" Annals of Natural History '' by purchase. 



1 Slide (Glyciphagus palmifer) from Mr. Michael. 



12 Slides (Foraminifera) „ Mr. Hailes. 



1 Slide (Diatoms, from Yarra Eiver) ... „ Mr. Priest. 



1 Slide (Diatoms from Yarra Eiver) selected") Mr< rpoppino'. 



and aranged... ... ... ... ) 



A series of Slides of parasites of the Rat,") w f Mr. Beulah 



Babbit, &c ) |per Mr. T. Curties. 



Photographs of the Eev. W. M. Hutton, the Rev. W. Quekett, and Mr J. 

 R. Eddy, were presented to the album. 



The thanks of the meeting were unanimously voted to the donors. 

 Mr. Ingpen said it might be useful to some members to know that ground 

 glass slides could be obtained with a surface fine enough for microscopical 

 use. This surface was in the condition to which plate-glass was reduced 

 immediately before polishing, and was without any of the roughness observ- 

 able in ordinary ground glass. The specimen which he had brought for 

 inspection was prepared by Messrs. Chance, and he believed slides of it 

 could be obtained at Messrs. Home and Thornthwaite's. 



Mr West read a paper " On Microscopic tracings of Lissajous' Curves," 

 the subject being illustrated by specimens exhibited under microscopes in 

 the room ; also by larger figures of the same kiud, drawn upon smoked 

 glass, and a number of the well-known curves produced by Mr Tisley's 

 machine. 



Mr Ingpen read a letter from Mr. Wm. Webb, whose skill in microscopic 

 writing and ruling was known to most microscopists, highly praising 

 Mr. West's beautiful productions. Mr. Webb s opinion upon the sub- 

 ject was entitled to great weight from the great beauty of his own pro- 

 ductions, and his known skill in fine writing and ruling. Mr. West had 

 not referred to the value as test objects of some of these figures, in res- 

 pect of the possibility of measuring the lines of which they were composed. 

 If they had any figure in which the lines were more or less elliptical, they 

 might probably be so drawn that a band should be produced, showing wide 

 lines at the top of the ellipse, whilst the same number would be drawn very 

 much closer together towards the middle of the figure. In this way they 

 might obtain a series of bands of known number and character, and yet so 

 close as to be a very fair test for an objective. He thought that this was a 

 point at which these slides ceased to be mere toys. The difficulty hud been 

 mentioned as to the right kind of illumination to be used in examining these 

 very delicate figures, and he thought it would be a severe test to put one of 

 these slides before an amateur and ask him to show it properly. 



Mr Curties said he had great pleasure in assisting Mr. West in the illumi- 



