Joseph J. Casey,
P. O. Box 1696, New York City.
Several of us have organized a club for the exchange of minerals. We call it the American Mineralogical Club. We shall be glad to have any of the readers of Young People join us if they are willing to conform to the rules, which can be had upon application to the secretary.
George Davies, P. O. Box 80,
Pottstown, Montgomery County, Penn.
The following exchanges are offered by correspondents:
Iron ore from Spain, Ireland, England, and different sections of the United States, for good specimens of copper or zinc.
Willie S. Shaffer,
20 North Second Street, Harrisburg, Penn.
Postmarks.