IC 6560 Pumice and Pumicite
- Organization:
- The National Institute for Occupational Safety and Health (NIOSH)
- Pages:
- 26
- File Size:
- 2165 KB
- Publication Date:
- Mar 1, 1932
Abstract
Pumice and pumicite are siliceous volcanic substances quite similar in
chemical composition , but somewhat different in physical properties , manner
of formation , and mode of occurrence . Production in the United States has
increased from 23,271 tons valued at $ 94,943 in 1910 , to 56,843 tons valued
at $336,099 in 1930. Both pumice and pumicite are included in these figures
as it has been impractical to collect statistical data on the separate commodities
.
Citation
APA: (1932) IC 6560 Pumice and Pumicite
MLA: IC 6560 Pumice and Pumicite. The National Institute for Occupational Safety and Health (NIOSH), 1932.