Tea, Coffee, and Cocoa PreparationsGuilford L. 1858-1925 Spencer, Ervin Edgar Ewell · First published 2018Open the Tome
The Fertilizing Value Of Street Sweepings, Issues 52-57Ervin Edgar Ewell, Harvey Washington Wiley, John William Mallet · First published 2015Open the Tome
Methods for the investigation of canceling inks and other stamping inksErvin Edgar Ewell · First published 1903Open the Tome
Exhibit of the Bureau of chemistry at the Pan-American exposition, Buffalo, New York, 1901Ervin Edgar Ewell · First published 1901Open the Tome
