This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Photograph of Michigan Sand Thrower NARA .tif Scope and content Original caption Michigan sand thrower being demonstrated by Roscommon Forest Fire Exp Station at Wellston Michigan Mr Meade of Roscommon operating General notes Local identifier Department of Agriculture Forest Service Region Eastern Region Most Recent File