Holding a cup between two lights you can really see the nephroid! pic.twitter.com/BK7TmrJcTD
— Dave Richeson (@divbyzero) May 19, 2018
from Twitter https://twitter.com/GuideCalculator
May 19, 2018 at 09:25PM
via IFTTT
Saturday 19 May 2018
RT @divbyzero: Holding a cup between two lights you can really see the nephroid! https://t.co/BK7TmrJcTD - The Calculator Guide from Twitter
from Twitter https://twitter.com/GuideCalculator
May 19, 2018 at 09:25PM
via IFTTT
