Reference for Bava Kamma 197:17

ואי בעית אימא דכולי עלמא ישנה לשכירות מתחילה ועד סוף והכא במקדש במלוה קמיפלגי דרבי מאיר סבר המקדש במלוה מקודשת ורבנן סברי המקדש במלוה אינה מקודשת

Would it therefore not appear that they<span class="x" onmousemove="('comment',' I.e., R. Meir and the Rabbis. ');">³¹</span> differed on the question whether a craftsman acquires title to the improvement carried out by him upon an article, R. Meir maintaining that a craftsman acquires title to the improvement carried out by him upon an article,<span class="x" onmousemove="('comment',' So that when he makes her bracelets, earrings and rings out of her material, the improvement becomes his and could therefore constitute a valid consideration. ');">³²</span> while the Rabbis maintained that the craftsman does not acquire title to the improvement carried out by him upon an article?<span class="x" onmousemove="('comment',' But since the improvement was never his he only had an outstanding debt for the hire upon the other party who was in this case his prospective wife, and as the forfeiture of a debt is not sufficient consideration some 'actual value' must be added to make the consideration valid. ');">³³</span> — No; all may agree that the craftsman does not acquire title to the improvement carried out by him upon an article, and here they differ as to whether there is progressive [liability for] hire from the very commencement of the work until the very end, R. Meir maintaining that there is no liability for hire except at the very end,<span class="x" onmousemove="('comment',' I.e., when he restores her the manufactured bracelets etc., in which case the hire had previously never become a debt. ');">³⁴</span> whereas the Rabbis maintained that there is progressive [liability for] hire<span class="x" onmousemove="('comment',' Which thus becomes a debt rising from perutah to perutah (and as such could not constitute valid consideration). ');">³⁵</span> from the commencement until the very end.<span class="x" onmousemove="('comment',' V. p. 578, n. 7. ');">³⁶</span> Or if you wish I may say that in the opinion of all there is progressive [liability for] hire<span class="x" onmousemove="('comment',' Which thus becomes a debt rising from perutah to perutah (and as such could not constitute valid consideration). ');">³⁵</span> from the very commencement to the end,<span class="x" onmousemove="('comment',' V. p. 578, n. 7. ');">³⁶</span> but here they<span class="x" onmousemove="('comment',' R. Meir and the Rabbis. ');">³⁷</span> differ [in regard to the law] regarding one who betroths [a woman] by [forgoing] a debt [due from her], R. Meir maintaining that one who betroths [a woman] by [forgoing] a debt [due from her] would thereby effect a legal betrothal, whereas the [other] Rabbis maintained that he who betroths [a woman] by [forgoing] a debt [due from her] would thereby not effect a valid betrothal.<span class="x" onmousemove="('comment',' V. p. 578, n. 8. ');">³⁸</span>

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