Pictures Study Guide Eruvin 56 Today's daf is sponsored by by Rachel Alexander Levy in honor of her mother, Sheila Alexander. When Mom created the Jewish Day School 40 years ago, would she have every thought that I would be learning Daf Yomi at age 47! And by Caroline Ofstein in honor of Yakir's bar mitzvah and for a refuah sheleima to Sheindel Chaya Bat Leah בתוך שאר חולי ישראל. Does a Torah scholar needs to live in a place that has vegetables? Are vegetables good for you or bad for you? One should not live in a place with uphills and downhills as it causes premature old age. When one squares off a round city for the purposes of techumim, how does one do it? Each side needs to correspond to the four directions - North, South, etc. The gemara gives advice about how to determine where the directions are - either based on the constellations or on the direction of the sun at different times of the year. How much extra does one get on the angles? A braita is quoted regarding the 1,000 cubits outside each of the Levite cities that are left wmpty as compared to the whole space around the city of 2,000 cubits - a ratio is brought of 1 to 4 and the gemara brings a number of explanations of how this ratio makes sense.