Public domain photos

The image shows a black and white drawing of a piece of wood with a line drawn on it. At the bottom of the image, there is a scale with numbers and alphabets written on it, which is likely a representation of the wood grain.

The image shows a black and white drawing of a piece of wood with a line drawn on it. At the bottom of the image, there is a scale with numbers and alphabets written on it, which is likely a representation of the wood grain.Open in library