PROCEEDINGS OF SCIENTIFIC SOCIETIES. 445 
nda and the theories proposed to account for its origin. Observ- 
ing th at in nature quartz-rock is often dissolved in water by the for- 
path thus indicated, and produce, artificially, a liquid hydrate of 
Silica. 
The Secretary read a paper by Col. Whittlesey, of Cleveland, on the 
weapons and military character of the Race of the Mounds. The au- 
thor brought to notice the curious fact, that while extensive fortifica- 
tions built by the Mound race remain scattered over the plains of 
Ohio, no weapons formed exclusively for warfare have yet been dis- 
0 , hor there any indications that the defences have ever 
writers distinguish the progress of mechanical arts among men as the 
ages of Stone, of Bronze, and of Iron, in the Western siny the an- 
retrograded. He believed that the European age of Bronze corre- 
sponded to the age of Copper in this country, to which the age of 
Stone has succeeded, and that to this age the Indians of the present 
day belonged 
April 4, 1867.— Mr. James G. Swan presented a paper on the Meteo- 
rology of si Flattery, Washington Territory, the result of personal 
observation of the thermometer and rain gauge for three consecutive 
ears. 
. Andrew Garratt exhibited a bony mass taken from the interior 
of an external shell of fibrous tissue, dense and glistening like parch- 
ment, and an interior spongy mass of a brownis hat fatty 
substance; isn opaa to be a coagulum of fibrine, or possibly a patho- 
logical growth from the valves of the heart 
At ies vey atest of the Section of Entom ology —records of which 
were read at this time—Mr. S. H. Scudder exhibited drawings and 
