37 
the complementary colour through the condenser ; hairs on 
the edges of leaves, petals, and Aliments 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 fox- 
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 
