21 



the excursion committee if they would send them a list of such places for the 

 sake of varying and extending the field of research. 



Mr. Mclutire read a paper " On Pseudo-seorpioiies." Seepage 8. 



The Secretary read a paper by llr. Charles Nicholson, M.A., of Ediuburgli, 

 " On Object Glasses for the Microscope." 



The object of the writer was chiefly to point out the desirability of limiting 

 the number contained in a set of object glasses as much as possible, and at 

 the same time to obtain the necessary magnifying powers with the first and 

 second eye-pieces. He endeavoured to show that eight powers would '• span" 

 the whole present power of the microscope by the following table. Eye- 

 piece A is taken as having a magnifying power of 5 ; B, of 7^ ; C, 10 ; 

 D, 12i ; and E, 15. 



The President announced that lists were open for the receipt of the names 

 of members desirous of joining the three classes, namely, Mr. Suffolk's for 

 Microscopic Manipulation, Mr. Cooke's for studying Microscopic Fungi, and 

 Dr. Braithwaite's for studying the Mosses. 



It was announced that at the next meeting Mr. Burgess would read the 

 first of two papers on " Wools, microscopically and commercially considered." 



NOV. 22nd , 1867. 

 Arthur E. Durham, Esq., President, in the Chair. 



The minutes of the preceding meeting were read and signed by the Chair- 

 man. 



The Secretary announced the following donations to the club : — Two slides 

 from Mr. Mclutire : five slides from Mr. Geo . Potter ; one slide from Mr. 

 Moginie ; a large engraving of Daphnia Pulex from Mr. Curties ; the 

 '* Naturalists' Circular," from the Editor ; '• Science Gossip," from the pub- 

 li.-her ; and the last new edition of " How to work with the Microscope," 

 from Dr. Beale. 



The thanks of the members were ordered to be presented to the respec- 

 tive donors. 



The following names of gentlemen proposed for membership were read by 



