๐”– Bobbio Scriptorium
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Some Results of Mycological Work in U.S. Dept. of Agriculture

โœ Scribed by F. Lamson Scribner


Book ID
123985241
Publisher
The University of Chicago Press
Year
1888
Weight
394 KB
Volume
13
Category
Article
ISSN
0006-8071

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## May, I926. ] CURRENT TOPICS. 669 in 19t 9 showed that two forms of organic sulphur usually exist in coal. Iron sulphide occurs in different forms. Examination of sections under the microscope shows often minute particles of pyrite or marcasite. Fraser and Yancey give numerous analyses of coals