Experiments on the Etching of Siderites

Abstract

A number of old and new etching reagents for meteorites have been tested. None was found to be superior to those already in general use, except that the recent report that the addition of a little glue gives improved results is confirmed. Some other colloidal additives also were found to give a better etch, but none was better than glue. A few other experiments also are briefly mentioned. All workable reagents give the same kind of figures.