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Eruvin 14: Rabbinic Geometry Represent!

Parameters needed for a koreh and lechi, and a round koreh, with its circumference and diameter… leads to a tangent… King Solomon’s pool that was 10 amot across, and 30 amot in circumference (an approximation of our knowledge of 蟺d, or, if you prefer, 2蟺r). This Yam shel Shlomo answers a question about the brim of a koreh. And what about the volume? As compared to mikvaot (at 40 seah!). Also, the next mishnah, defining the lechi: 10 tefachim by amount (or 3 tefachim, according to R. Yosi). How does this align with the requirement for one or two lechis? Plus, a definition of “any amount” for the width/depth of the lechi.


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Anne and Yardaena

Anne Gordon is the deputy editor of Ops & Blogs at The Times of Israel. She is a veteran educator, having taught in high school and post-high school institutions in Israel and America for several decades. Yardaena Osband is a pediatrician and teaches in her community and online. They both hail from Boston, proud alumna of Maimonides School, where they first learned Gemara. Talking Talmud is their conversation (via podcast) on the daf yomi. They say: "Learning the daf? We have something for you to think about. Not learning the daf? We have something for you to think about! (Along with a taste of the daf...) Join the conversation with us!"
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