257 
reflector of 4in. aperture, equatorially mounted in his Obser- 
vatory at Ardwick ; and Mr. Baxendell with Mr. Worthing- 
ton’s achromatic equatorial of 5in. aperture, power 68. The 
sky in the neighbourhood of the moon was covered with white 
cirrous haze, and all the observers remarked that the images 
of the moon and planet were very unsteady. No distortion 
of the image of the planet was noticed ; but Messrs. Wor- 
thington and Baxendell remarked that at the disappearance 
of the planet the last point of light lingered for one and a-half 
or two seconds before its final extinction. Mr. Baxendell 
also observed that during the passage of the dark limb of the 
moon over the planet, the light of the planet’s disc was 
sensibly brighter close to the moon’s limb than at any other 
part ; but when the planet emerged at the moon’s bright limb 
that portion of its disc immediately adjoining the moon’s limb 
was decidedly darker than the rest. 
Mr. Baxendell reported that after April 20 the oblique 
belt on Jupiter increased in length at a rapidly increasing rate, 
and that on May 6 it was observed both by Mr. Long and 
himself to extend completely round the planet, the preceding 
end slightly overlapping the following as shown in Fig. 6, 
taken from a drawing made by Mr. Long. From February 
29, the date of Mr. Long’s first observation of the belt, to 
April 20, the average rate of increase had been 3,640 miles 
per day ; but from April 20 to May 6, the average rate had 
increased to 5,460 miles per day, or 227‘5 miles per hour! 
MICROSCOPICAL SECTION. 
April 16th, 1860. 
The Secretary read a Paper, by Mr. Hepworth, “ On 
Preparing and Mounting Insects.” 
