the ova of these insects must have been about the apparatus. We 
published at the time Mr. Crosse’s experiments, and our views of the 
nature of the results. 
Mr. Weekes’ paper is a detailed account of the means employed to 
insure perfect freedom from the presence of all organic life, in and 
about the apparatus employed, and these means certainly seem to have 
been as perfect as can be devised to effect this object. The solution 
operated on was silicate of potassa, enclosed in an air-tight vessel of 
glass, to which the electrical current passed. ‘The operation of the 
battery was continued during more than thirteen months. Two appa- 
ratus precisely similar in all respects were employed, only that one 
contained pure oxygen gas obtained from oxide of manganese at a red 
heat, and the other common air. The experiment was ae Decem- 
ber 3d, 1840, and says Mr. Weekes— 
ee a the 16th of Horember, 3641, I observed that the re in a OE 
as aan the greater portion of silicious matter previously awe in »golation, had 
xa : 
exact representatives of those which ey appeared in the Broomfield experi- 
ments, crawling freely about on the inner surface of the bell glass: two were 
full grown, the rest in a less forward state.’’ 
We should be glad to republish Mr. Weekes’ entire paper, but our 
limits forbid. It is sufficient to say, that his experience proves in @ 
satisfactory manner the accuracy of Mr. Crosse’s accounts, and that 
the anomalous insects appeared from time to time and in consid- 
erable numbers. We have, through the kindness of Mr. Lettsom, 
been favored with a view of these remarkable creatures, and we find 
them to correspond in form with the figures of Mr. Crosse, given by us 
as above quoted. Truly, there are more things in heaven and earth 
than are > dreamt of in our philosophy. 
4. Remarks upon Mr. Murchison’s Anniversary Address a | 
London Geological Society ;—extract of a letter front Prof. E. Hitcs- 
cock, of Amherst College, to the Editors, dated July 5th, 1842. my 
in reading Mr. Murchison’s able Address at the anni 
London Geological Society, in February last, has been greatly 
e¢ by finding, in the first place, that he supposes I have misun- 
this opi eat ta lh yt pecan gad + — 
hat he misunderstands 
wie 
. 
