188 
most important adjunct and complement to our great system 
of Public Education. 
“March 18th, 1871. 
The President in the chair. Twenty-four persons present. 
Mr. J. W. Warp called attention to an error of omission 
in the minutes of the Lyceum, as published on page 98 of 
the Proceedings. He wished a correction to be made to the 
effect that as soon as he heard Prof. Edwards’ statement that 
the white material, said to have come from a bed of clay in 
Delaware, exhibited by him at the previous meeting of the 
Lyceum, contained diatomaceous remains, and was in fact 
the same material as the so-called ‘‘ Electro-Silicon,” or infu- 
sorial deposit of Nevada, he had immediately explained that 
the announcement of Prof. Edwards disclosed to him the 
fact, that he had inadvertently exhibited the wrong material. 
Several packages of white earths were lying upon his table, and 
in the carelessness of haste, he had taken the wrong one; 
and that although the specimen he had, without due examina- 
tion, placed on the table of the Lyceum, was truly enough 
the Nevada Tripoli, with the diatomaceous character of which 
he was quite familiar, having frequently examined it micro- 
scopically, and recorded its contents, it was nevertheless 
equally true, that the specimen of the Delaware deposit, 
which he had intended to exhibit, contained, as he had sta- 
ted, no organic forms, and was largely composed of Mica, 
though not wholly so, as had by some been supposed. He 
did not present the specimen, which he now correctly exhibi- 
ted, for examination for infusorial organisms, for he knew it 
contained none; but as containing a notable quantity of pul- 
verized mica. 
Dr. L Wauz remarked that it was a noticeable’ fact, that, 
not uncommonly, material appeared in the market in this- 
