ג אמימר ומר זוטרא ורב אשי הוו יתבי קמיה אומנא שקלי ליה קרנא קמייתא לאמימר חזייה אמר להו אדום דתנן כי האי שקלי ליה אחריתי אמר להו אשתני אמר רב אשי כגון אנא דלא ידענא בין האי להאי לא מבעי לי למחזי דמא
3 deal with the question of red blood?<span class="x" onmousemove="('comment',' But, if so, how could the authorities (supra 19b) maintain that menstrual blood is intensely red like that, for instance, of a young unmarried man? ');"><sup>4</sup></span> — No; with that of other kinds of blood. Amemar and Mar Zutra and R. Ashi once sat before a cupper,<span class="x" onmousemove="('comment',' For an operation of blood drawing with cupping horns. ');"><sup>5</sup></span> and when the first cupping-horn was taken off Amemar he saw it and said to the others, 'The red<span class="x" onmousemove="('comment',' In respect of menstrual blood. ');"><sup>6</sup></span> of which we have learnt<span class="x" onmousemove="('comment',' In our Mishnah. ');"><sup>7</sup></span> is a shade like this'. When the second one was taken off from him, he said to them, 'This has a different shade'. 'One like myself', observed R. Ashi, 'Who does not know the difference between the one and the other must not act as an examiner of blood'.