Leonardo da Vinci’s sketch of a tree illustrates the principle that combined thickness is preserved at different stages of ramification.

It appears he was set for an approved-by-Michaels sketch in which the business mogul would be dressed up like a tree while standing next to Shel Silverstein’s titular Giving Tree, who offers up ...

Osis // Ash; Kastanis // Chestnut; Ozols // Oak; Egle // Fir; Pīlādzis I // Rowan I; Akācija // Acacia; Dižskābardis // Beech; Pīlādzis III // Rowan III ...

13 x 19.38 in. (33 x 49.2 cm.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...