Lettered balance and wheel diagrams
Faint transmitted-light sheet with small mechanical diagrams labelled with letters.
Seen faintly by transmitted light, the sheet carries small mechanical diagrams labelled with letters together with rows of text and numerals. The upper part shows a beam or rod with points marked and small weights hung from it, and a wheel on an axle traced with a dotted path. The only text supplied for the sheet is the caption noting a figure with letters; the diagrams are otherwise described from the image.
On this page
Beam with marked points and hung weights
At the upper left a horizontal beam or vertical rod is drawn with points marked along it and small weights suspended, in the manner of a balance or weighing study. Faint ruled lines extend the construction across the sheet.
Wheel on an axle
A small wheel set on an axle is drawn near the top of the right leaf, with a dotted line marking its path or a suspended weight. It stands apart from the surrounding text.