Report of the Commissioner of Patents for the year ..
This is a United States Patent Office annual report for 1849, published in Washington by the Office of Printers to the House of Representatives, and it lists patents granted for agricultural machinery to inventors and the government. The pages show numbered engraved diagrams of farm implements such as wheeled carts, planters, ploughs and a seed or grain machine, each with lettered parts and figure labels. A designer could draw on their crisp mechanical line work, clear part-labelling and dense plate layouts for technical diagram styling.
