Harry Nielson's 1917-19 Biology & Hygiene Notebooks with Tons of Diagrams broccoli with cutout windows at front

with cutout windows at front and back and a front door that opens wide and (almost) latches closed

and row of potted tulips on the shelf at right

I just can't resist naive floral watercolors like this one

church 3 1/16" t with steeple

this one is different

Harry Nielson's 1917-19 Biology & Hygiene Notebooks with Tons of Diagrams broccoli with cutout windows at frontI really love these high school notebooks, kept by a Harry S. Nielson in 1919 for biology and hygiene class, with lots and lots of primitively hand drawn diagrams, which I find immensely appealing and almost make me want to the subjects such as "how to locate the boiling point" and how magnets work. My favorite is a section off charts diagramming the proportions of water, protein, fat, carbohydrates and ash in various foods, from dried figs to bacon,