Just like the rest of us, LeonarÂdo da VinÂci dooÂdled and scribÂbled: you can see it in his digÂiÂtized noteÂbooks, which we feaÂtured this past sumÂmer. But the proÂtoÂtypÂiÂcal RenaisÂsance man, both unsurÂprisÂingÂly and charÂacÂterÂisÂtiÂcalÂly, took that scribÂbling and dooÂdling to a highÂer levÂel entireÂly. Not only do his marÂgin notes and sketchÂes look far more eleÂgant than most of ours, some of them turn out to reveal his preÂviÂousÂly unknown earÂly insight into imporÂtant subÂjects. Take, for instance, the study of fricÂtion (othÂerÂwise known as triÂbolÂoÂgy), which may well have got its start in what at first just looked like dooÂdles of blocks, weights, and pulÂleys in LeonarÂdo’s noteÂbooks.
This disÂcovÂery comes from UniÂverÂsiÂty of CamÂbridge engiÂneerÂing proÂfesÂsor Ian M. HutchÂings, whose research, says that departÂmenÂt’s site, “examÂines the develÂopÂment of LeonarÂdo’s underÂstandÂing of the laws of fricÂtion and their appliÂcaÂtion. His work on fricÂtion origÂiÂnatÂed in studÂies of the rotaÂtionÂal resisÂtance of axles and the mechanÂics of screw threads, but he also saw how fricÂtion was involved in many othÂer appliÂcaÂtions.”
One page, “from a tiny noteÂbook (92 x 63 mm) now in the VicÂtoÂria and Albert MuseÂum in LonÂdon, dates from 1493” and “conÂtains Leonardo’s first stateÂment of the laws of fricÂtion,” sketchÂes of “rows of blocks being pulled by a weight hangÂing over a pulÂley – in exactÂly the same kind of experÂiÂment we might do today to demonÂstrate the laws of fricÂtion.”
“While it may not be posÂsiÂble to idenÂtiÂfy unequivÂoÂcalÂly the empirÂiÂcal methÂods by which LeonarÂdo arrived at his underÂstandÂing of fricÂtion,” HutchÂings writes in his paper, “his achieveÂments more than 500 years ago were outÂstandÂing. He made tests, he observed, and he made powÂerÂful conÂnecÂtions in his thinkÂing on this subÂject as in so many othÂers.” By the year of these sketchÂes LeonarÂdo “had eluÂciÂdatÂed the funÂdaÂmenÂtal laws of fricÂtion,” then “develÂoped and applied them with varyÂing degrees of sucÂcess to pracÂtiÂcal mechanÂiÂcal sysÂtems.”
And though triÂbolÂoÂgists had no idea of LeonarÂdo’s work on fricÂtion until the twenÂtiÂeth cenÂtuÂry, seemÂingÂly unimÂporÂtant drawÂings like these show that he “stands in a unique posiÂtion as a quite remarkÂable and inspiÂraÂtional pioÂneer of triÂbolÂoÂgy.” What othÂer fields of inquiry could LeonarÂdo have pioÂneered withÂout hisÂtoÂry havÂing propÂerÂly acknowlÂedged it? Just as his life inspires us to learn and invent, so research like HutchÂings’ inspires us to look closÂer at what he left behind, espeÂcialÂly at that which our eyes may have passed over before. You can open up LeonarÂdo’s noteÂbooks and have a look yourÂself. Just make sure to learn his mirÂror writÂing first.
RelatÂed ConÂtent:
LeonarÂdo da Vinci’s VisionÂary NoteÂbooks Now Online: Browse 570 DigÂiÂtized Pages
LeonarÂdo da Vinci’s Bizarre CarÂiÂcaÂtures & MonÂster DrawÂings
LeonarÂdo Da Vinci’s To Do List (CirÂca 1490) Is Much CoolÂer Than Yours
Based in Seoul, ColÂin MarÂshall writes and broadÂcasts on cities and culÂture. His projects include the book The StateÂless City: a Walk through 21st-CenÂtuÂry Los AngeÂles and the video series The City in CinÂeÂma. FolÂlow him on TwitÂter at @colinmarshall or on FaceÂbook.