Reference for Chullin 89:25

אמרוה קמיה דרבי יוחנן אמר

Raba said: 'The nethermost lobe' really means the uppermost lobe,<span class="x" onmousemove="('comment',' It is clear that the top lobe of the lung is meant but the description of it will vary according to the position of the animal. If the animal is suspended by its hind legs the top lobe is really the nethermost.');">¹⁵</span>

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