While boning up on transistors, I came across a picture of Homer Simpson on the wrong side of a falling anvil. http://www.ittc.ku.edu/~jstiles/312/handouts/312_Introduction_package.pdf & scroll down to page 5. The anvil is an Arm & Hammer, but what are the chunks out of the tail? Anyone recognise what such an anvil would be used for? -- Bruce NJ