Physics & Mechanics2,539 pages · 25 collectionsMachines & Devices1,942 pages · 25 collectionsGeometry1,764 pages · 25 collectionsArithmetic & Proportion1,352 pages · 23 collectionsOptics & Light1,008 pages · 22 collectionsPainting & Perspective990 pages · 26 collectionsHydraulics977 pages · 21 collectionsWeapons & Fortification532 pages · 23 collectionsFigure Studies532 pages · 24 collectionsArchitecture481 pages · 22 collectionsFlight299 pages · 19 collectionsCivil Engineering290 pages · 20 collectionsPersonal Notes261 pages · 21 collectionsFables & Prose244 pages · 20 collectionsLists & Accounts199 pages · 14 collectionsBotany184 pages · 17 collectionsGeology151 pages · 17 collectionsAstronomy144 pages · 17 collectionsOrnament & Heraldry144 pages · 18 collectionsLandscape139 pages · 17 collectionsSculpture & Casting132 pages · 17 collectionsHorses & Animals118 pages · 19 collectionsCartography114 pages · 11 collectionsAnatomy104 pages · 17 collectionsLanguage & Latin85 pages · 9 collections
Each theme gathers the pages of the library whose Reader's Edition identified that subject — 28 collections read page by page.