Small idea about microtomes. I heard once that a crude but workable microtome could be created from a large nut and bolt, each with a matching fine thread. Back off the bolt until is is almost readily to fall off the nut, place the specimen in the hollow formed by the nut and bolt, add melted wax to embed the specimen and let the wax cool. Then, by gradually tightening the bolt to slightly extrude the wax/specimen, you can use a razor blade to slice off thin pieces which you can fix on a slide, stain them, and view them through the microscope.