37 



the complementary colour through the condenser ; hairs on 

 the edges of leaves, petals, and filiments of stamens, &c., then 

 appear illuminated by the li ght of the condenser of one colour, 

 and fringed with the opposite colour on an intensely black 

 ground. The Author gives a list of the botanical names of 

 objects advantageously illuminated by this method. A single 

 coloured disc may be also used to advantage with white light 

 from the bull's eye lens. Details of structure are observable 

 by means of this instrument, which the Author observed are 

 inconspicuous without its aid, and thinks that its efficacy in 

 connexion with such a variety of purposes, cannot fail to 

 render it of value to the scientific observer. 



The reading of the Paper gave much satisfaction to the 

 members of the Section, and it was resolved to communicate 

 the same to the Society, with a recommendation that it should 

 be printed in extenso in its Memoirs. 



The Secretary read a Paper, " On Preparing Objects 

 found in Soundings," and described Mr. Dale's process for 

 disposing of the tallow by means of highly rectified benzole, 

 which is most effectual. The benzole (called benzine by 

 French chemists), being recovered, to be used again as fast as 

 required for a dozen filters, each with its specimen in process 

 at the same time, with only trifling loss from evaporation. 



This Paper, and one by Mr. Dancer, on the same subject, 

 were ordered to be printed by the Section, for circulation 

 amongst its members. 



Mr. Brothers presented to the Section a very old 

 microscope, date unknown ; he also exhibited the actinophris 

 eichornii, melicerta, sea weed with lipraria, &c. 



Mr. Hardman, of Davyhulme, presented three mounted 

 specimens of the wire worm, and a number of dissecting- 

 needles for the use of the members ; he also exhibited a 



