Über dieses Buch
Meine Mediathek
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CONTENTS
Preface...
Page
25
Part I. The Molding Sands of Maryland. By David W. Trainer, Jr... 27
Introduction...
Purpose of Investigation..
Field work....
Transportation facilities..
29
2222222
Laboratory work.......
Requisite properties of molding sands.
General statement...
Texture.....
31
32
Part II. Notes on Feldspar, Quartz, Chrome, and Manganese in Mary-
land. By Joseph T. Singewald, Jr.
The Feldspar Industry in Maryland..
84
88
91
93
Economic aspects of Maryland Feldspar Industry....
Description of deposits....
102
106
Harford County..
Economic aspects of the Maryland flint industry...
Description of deposits..
Indian Rock Flint Co. quarries...
138
140