Malaria mosquitoes controlled by airplane dusting : (U. S. Dept. of Agriculture.)

• Publisher: Elsevier Science
• Year: 1926
• Tongue: English
• Weight: 97 KB
• Volume: 201
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(26)91109-5

✦ Synopsis

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 to show the respective proportions of pyrite and organic sulphur and also tables showing material reduction of sulphur by methods of washing. The paper concludes with a discussion of the relation of sulphur to the manufacture of pig iron.

H.L.