Responsa for Menachot 74:15
רבינא הוה קא אזיל אבתריה דמר בר רב אשי בשבתא דריגלא איפסיק קרנא דחוטיה ולא אמר ליה ולא מידי כד מטא לביתיה אמר ליה מהתם איפסיק א"ל אי אמרת לי מהתם שדיתיה
R'Shisha the son of R'Idi said, If a man cut off [one corner of] his garment,<span class="x" onmousemove="('comment',' Either he cut away a square piece at the corner, leaving behind two right-angled corners, thus making the garment five-cornered; or, he cut away one corner diagonally, leaving two obtuse-angled corners.');"><sup>17</sup></span> he has gained nothing, for he has simply made it into a five-cornered garment.<span class="x" onmousemove="('comment',' Which must also be provided with fringes.');"><sup>18</sup></span>
Teshuvot Maharam
Q. On the Sabbath, may a Jew use latrines which are built in the city wall and open into a ditch surrounding the wall, so that the feces falling into the ditch are moved (by his force) from one Sabbath domain into another?
A. He should fasten a board beneath the seat (within not more than three tefahim below the latrine walls) so that the feces first fall on the board and then into the ditch. Should the board break on the Sabbath, he would still be permitted to use the latrine on that day.
SOURCES: Cr. 178, 179; Pr. 96; L. 349; Mord. Shabb. 376; Hag. Mord. Shabb. 461; Tashbetz 38; Hag. Maim., Shabbat 15, 4; Kol Bo 31 (p. 34a). Cf. Terumat Hadeshen 66.
A. He should fasten a board beneath the seat (within not more than three tefahim below the latrine walls) so that the feces first fall on the board and then into the ditch. Should the board break on the Sabbath, he would still be permitted to use the latrine on that day.
SOURCES: Cr. 178, 179; Pr. 96; L. 349; Mord. Shabb. 376; Hag. Mord. Shabb. 461; Tashbetz 38; Hag. Maim., Shabbat 15, 4; Kol Bo 31 (p. 34a). Cf. Terumat Hadeshen 66.
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