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Bureau of mines midget impinger
Impinger was described in Report of Investigations n 3360, indexed in Engineering Index 1938 p 346; midget impinger flask and suction apparatus; collecting and counting samples; results of tests; device was tested against silica, Catoctin greenstone, and siliceous schist dust and gave results that agree well with those obtained with large impinger. (Cement Mill Sec) (See also U S Bur Mines -- Information Cir n 7076 June 1939 7 p supp plates)
Bureau of mines midget impinger
Impinger was described in Report of Investigations n 3360, indexed in Engineering Index 1938 p 346; midget impinger flask and suction apparatus; collecting and counting samples; results of tests; device was tested against silica, Catoctin greenstone, and siliceous schist dust and gave results that agree well with those obtained with large impinger. (Cement Mill Sec) (See also U S Bur Mines -- Information Cir n 7076 June 1939 7 p supp plates)
Bureau of mines midget impinger
Concrete
Schrenk, H.H. (author) / Feicht, F.L. (author)
Concrete ; 47
1939
2 pages
Article (Journal)
English
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Bureau of mines midget impinger
| Engineering Index Backfile | 1939
Dust sampling with bureau of mines midget impinger, using new hand operated pump
| Engineering Index Backfile | 1938
Dust sampling with bureau of mines midget impinger, using new hand operated pump
| Engineering Index Backfile | 1938
Bureau of mines instruction car
Engineering Index Backfile | 1928