424 Miscellaneous Intelligence. 
The next session of the Academy will be held at Northampton, Mass., 
commencing on the 7th of August. 
of Microscopical Science,” and the more extended one in the January 
number of the “Intellectual Observer,” where the substitution of a glass 
plate for the metallic reflector, is spoken of in the highest terms. Now 
Microscopical_J ournal. 
mination may be obtained. The improved “Illuminators” are now tur- 
nished with an extra movable diaphragm above the illuminating reflector, 
which, although it diminishes the angle somewhat, greatly improves the 
definition, by prevention of irradiation when the object is very brilliant; 
it leaves however the whole angle effective for illumination. I certainly 
as in number of the “Microscopical Journal” for January, 186 
where a contrivance, already described by me, is so carefully alluded to, 
that. no one would for a mom ppose that any credit was due except 
to be generous, 
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untain. From 
that day to the present the eruption has continued with varying intensity. 
Sometimes the light is quite brilliant, shedding a glow over all the 
higher portions of the mountain, sending down its reflection upon our 
