A split bean • Lentils • Geometric shapes • Old European coins: Tracing the shiur of the "Gris"
Shiur 14 (46) on halachic topics - by Rabbi Shraga Dovid Homnick, Sgan Rosh Kolel, Kolel L'horaah Ma'asis Crown Heights
https://www.youtube.com/watch?v=rmPkfnwKpB0