Stock Photo - Drawings by Leonardo Da Vinici on on the mechanical powers and forces, percussion, gravity, motion, optics and astronomy, with various arithmetical and geometrical propositions, Written backwards in the author´s own hand, and illustrated by diagrams and delineations. Leonardo Da Vinci´s rough Book of observations and demonstrations on subjects chiefly of mixed Mathematics, being unconnected notes written by him at different times, commencing 22 March, 1508.

@ 0.008 --> Keywords launching task... @ 0.008 --> GetKeywords: Getting cache @ 0.019 --> _srcset calculated @ 0.035 --> begin dades json... @ 0.041 --> begin waiting GetItemsAsync... @ 0.054 --> itemsController.Get() completed! @ 0.056 --> GetKeywords: Request cached? True @ 0.062 --> pricing done @ 0.062 --> Dades JSON completed! @ 0.062 --> Keywords task start waiting @ 0.116 --> GetKeywords: File obtained @ 0.116 --> GetKeywords: File to Json @ 0.117 --> GetKeywords: DocLastUpdate checked @ 0.117 --> GetKeywords: Cached item @ 0.118 --> GetKeywords: keywords ampliacion @ 0.118 --> Keywords task completed @ 0.126 --> Schema completed @ 0.126 --> Adobe ads... @ 0.126 --> Adobe ads done @ 0.126 --> controller done