Chalk or crayon mark on rear cover.
From Iron, Steel, and Other Alloys, by Henry Marion Howe (1903). [Here]
![Chalk or crayon mark on rear cover.
From Iron, Steel, and Other Alloys, by Henry Marion Howe (1903). [Here]](http://25.media.tumblr.com/tumblr_lvv85mdfmH1qixa76o1_400.png)
