#national3dday

[harvardfineartslib]

In celebrating National 3-D Day today, we’re posting stereographs from our Special Collections. Stereographs were very popular in the United States and Europe from mid-1850s to 1900s. First demonstrated in 1832 by English physicist Sir Charles Wheatstone, then improved by Sir David Brewster in 1849, stereographs were the original virtual reality! As you can see from the first image, two photos of the same subject are shown side by side, then the image is viewed through the lenses as shown in the second image. The two images of the same subject are brought together as one image that has an illusion of three-dimensionality by the effort of the human brain.

Image 1: House of Simon the Tanner, Jaffa, Palestine 9 x 18 cm Underwood & Underwood, United States, 1882-1920 [publisher] 1896 Repository: Harvard Fine Arts Library, Special Collections HOLLIS number: olvwork475174

[rosesilverangel]

#Repost @natdaycal • • • • • The role of #NationalAgDay begins with community and is far greater than the food showing up on our tables. From FFA or 4-H to farm co-ops to large operations it is the people who make this an easy National Day to celebrate. #NationalGoofOffDay #National3DDay #BavarianCrepesDay #AmericanDiabetesAssociationAlertDay #NationalWestVirginiaDay Get on board! - Be sure to follow and Tag @NatDayCal with your favorite way to celebrate the over 1,500 #NationalDays. (at Darlington, South Carolina) https://www.instagram.com/p/CbbnCsYMuLO/?utm_medium=tumblr

[sfc-paulchambers]

• @natdaycal Today is an opportunity to let your silly side shine while taking a lighter approach to the day. Have some fun and just be goofy. Try it. I promise you will like it. #NationalAgDay #NationalGoofOffDay #National3DDay #BavarianCrepesDay #AmericanDiabetesAssociationAlertDay #NationalWestVirginiaDay Did you know, tomorrow never comes? That is why we Celebrate Every Day. Tag @NatDayCal with your favorite way to celebrate the over 1,500 National Days. (at Middle Tennessee Area) https://www.instagram.com/p/CbZyfsUuK7x/?utm_medium=tumblr

[renderedink]

Just found out that it is National 3-D Day! (Thanks to @mitchoconnellart ) A while back I taught myself how to create old school blue and red 3D. Art by my buddy @derecdonovan #national3dday #3d #tmnt #teenagemutantninjaturtles #raphael #3dcomics https://www.instagram.com/p/B926zMyFP75/?igshid=j2r1kc501plw