[Illustration]
Amongst the curiosities of THE STRAND a few months ago we gave an
illustration of a section of a board taken from a wheat trough, worn
by wheat passing over it. Here is a photograph, sent in by Mr. Byron
Harman, of the Tacoma Grain Company, Washington, showing a steel-plate,
4ft. square and ½in. thick, taken from a large elevator at Tacoma, that
has actually had holes worn through it by wheat continually falling on
it from a height of 4ft.