טז ואלא הא דאמר רב יהודה קורה ארבע מתרת בחורבה ורב נחמן אמר רבה בר אבוה
16 but then, even if he explains, 'below the water',<span class="x" onmousemove="('comment',' Sc. the partition must be fixed in the floor of the cistern.');"><sup>47</sup></span> is not the water mixed?<span class="x" onmousemove="('comment',' Above the partition; since the water may be deeper than the height of the partition the prescribed size of which is only ten handbreadths.');"><sup>51</sup></span> - The other replied: Have you not heard the statement which Rab Judah made in the name of Rab or, as others are inclined to assert, in the name of R'Hiyya: The tops of the reeds<span class="x" onmousemove="('comment',' Of which the partition in the water is made.');"><sup>52</sup></span> must be seen projecting one handbreadth above the surface of the water! Furthermore,<span class="x" onmousemove="('comment',' It was asked.');"><sup>53</sup></span> with reference to Rab Judah's submission that ABOVE<span class="x" onmousemove="('comment',' In the ruling of Beth Hillel.');"><sup>40</sup></span> means above the water',<span class="x" onmousemove="('comment',' V. supra n. 8.');"><sup>54</sup></span> why<span class="x" onmousemove="('comment',' Lit., 'what is the difference'.');"><sup>48</sup></span> does he not explain, actually above'?<span class="x" onmousemove="('comment',' Near the rim. There is no need to extend it to the water.');"><sup>41</sup></span> Apparently because the water would be mixed;<span class="x" onmousemove="('comment',' Beneath the partition.');"><sup>50</sup></span> but then, even if it is explained: 'above the water'<span class="x" onmousemove="('comment',' V. supra n. 8.');"><sup>54</sup></span> is not the water mixed?<span class="x" onmousemove="('comment',' Beneath the partition.');"><sup>50</sup></span> - The other replied: Have you not heard what Jacob of Karhina has learnt: One must insert the ends of the reeds into the water<span class="x" onmousemove="('comment',' According to Beth Hillel.');"><sup>55</sup></span> to the depth of a handbreadth.<span class="x" onmousemove="('comment',' The difference between Beth Hillel and Beth Shammai being that while Beth Hillel regard the partition as a mere symbol of division, in consequence of which it is not necessary to insert it below the depth of one handbreadth of water, Beth Shammai regard it as a proper division, in consequence of which its lower end must be inserted into the bottom of the cistern so that it may completely divide between the waters of the two domains.');"><sup>56</sup></span> With reference, however, to Rab Judah's ruling that a crossbeam of the width of four handbreadths effects permissibility<span class="x" onmousemove="('comment',' Of the movement of objects under it.');"><sup>57</sup></span> in a ruin,<span class="x" onmousemove="('comment',' If it lay on its width and reached from one wall to the other on the opposite side.');"><sup>58</sup></span> and to that of R'Nahman who, citing Rabbah B'Abbuha, ruled that