An image of "Gradual (Cod. H 74, folio 122v)", created by Matteo Di Filippo Torelli, c. 1413 (Tempera and gold on parchment, 248 x 237 mm).

A quiver, was principally made of hide or leather, and was adorned with gold, painting, and braiding. it had a lid, and was suspended from the right shoulder by a belt passing over the breast and behind the back. Its most common position...

This is a picture of the periodic table of chemical elements, an important set of information for anyone learning about chemistry. Elements such as hydrogen, carbon, oxygen, sodium, iron and gold are listed using their chemical symbols...