CONSTRUCTED IN STREETS INHABITED SOLELY BY ISRAELITES, AND REGULATIONS CONCERNING THE CONSTRUCTION OF AN ERUB BY A CARAVAN.
MISHNA: If an entry 1 be higher than twenty ells, it should be lowered. R. Jehudah said: "This is not necessary." If it be wider than ten ells, it should be made narrower, but if it have the appearance of a door, even though it be wider than ten ells, it need not be made narrower.
GEMARA: We have learned in a Mishna [Sukkah, I. a] that a booth which is higher than twenty ells is unfit for use, and R. Jehudah said, that it maybe used. Why does the Mishna in the case of an entry decree, that it should be remedied by lowering, while in the case of a booth it declares it unfit for use? Because in the case of a booth a number of other defects are mentioned in connection with the excessive height and each of those would require a special explanation as to how they were to be remedied, whereas in the case of an entry only two things are to be corrected, and the remedy for them is taught.
R. Jehudah said in the name of Rabh: The difference of opinion between the sages and R. Jehudah is based upon the door and the porch of pillars in the temple. We have learned in a Mishna, that the door of the Temple was twenty ells in height and ten ells in width and that the porch was forty ells in height and twenty ells in width. The sages compare the entry with the door and R. Jehudah compares it with the porch of the Temple, which was also more or less a door; and why does R. Jehudah say, that the porch is also a door, because it is written [Ezekiel xv. 48], "the porch of the house," and that is equivalent to the door of a house. Why do not the sages hold the porch to be a door? Because, were it written, "the door of the porch," the porch might also be considered a door; but as it is written, "the porch of the house," it means the porch which opens towards the house, but not a door to the house.
How can it be that R. Jehudah bases his dictum on the porch of the house? The porch was twenty ells in width, and when the Mishna decrees that if the entry be wider than ten ells it must be made narrower, he does not dissent? (Why did he not say, that it was not necessary to lessen its width?) Said Abayi: In the following Boraitha he does dissent as we have learned: "If the width of the entry exceed ten ells it should be made narrower, but R. Jehudah says, it is not necessary." Why is this omitted in the Mishna? He disputes with the sages concerning the height, hence it is evident that he also disputes as to the width.
Again: How can it be that R. Jehudah bases his dictum upon the porch of the house? Have we not learned in a Boraitha, that if an entry exceed twenty ells in height, it must be lowered? R. Jehudah, however, says, that it may be made even forty or fifty ells in height, and Bar Kappara taught, that it may be even one hundred ells high. As for Bar Kappara, it is assumed to be an exaggeration; but as for R. Jehudah it cannot be considered merely an exaggeration, because he bases his dictum upon the porch of the house, and that was only forty ells in height. Why does he say "or fifty"? Whence his basis for such an assertion? Said R. Hisda: Rabh erred on account of the following Boraitha: "We have learned, an entry which is higher than twenty ells, thus exceeding the height of the door of the Temple, should be lowered." Now Rabh assumed, that if the sages base their teaching upon the door of the Temple, R. Jehudah bases his dictum upon the porch of the Temple, but this is not so! R. Jehudah does not consider the Temple at all, but uses as a basis the palaces of kings, the doors of which attain excessive heights.
What is the law concerning an entry, the cross-beam of which was partly above twenty ells in height and partly below, and also concerning the covering of a booth, part of which was over twenty ells in height and the other part lower than twenty? Said Rabba: "An entry is made invalid by it but a booth is not affected." Why does he say that a booth is not affected by it? Because we assume that part of the covering of a booth, which is above twenty ells, to be so frail that it does not matter. Cannot the same thing be said concerning the cross-beam of an entry? If this were said with reference to a cross-beam, then it will seem as if there is no foundation for the cross-beam, and it is suspended in mid-air. Is this not the same with a booth? If it be said, that that part of the covering of the booth is so frail that it amounts to nothing, it cannot serve as protection against the sun and there will be more sunshine than shade, and this would make the booth invalid? But, as such is not the case and the frailty of the covering is as a matter of fact only imaginary, it does cause more shade than sunshine, and the booth is not made invalid, why should it not also be the same with the cross-beam, the frailty of which is also only imaginary while in reality it is as firm as if fastened with nails? Said Rabha of Parzekaia: "If such a defect occur in a booth, which is intended for the personal use (of a man), it will be remedied through the thoughtfulness of the man (who is bound to keep the commandment properly), but a cross-beam of an entry which is intended for public use will be neglected, because one man will rely upon another to remedy the defect, as the proverb goes, that a pot used in common is never warm nor cold" (one relies upon another to keep it in its proper condition). Rabhina said: The booth being a fulfilment of a biblical commandment needs no further safeguard, for it will be kept under any circumstances; but the entry being a purely rabbinical institution must not leave any loopholes, by which the entire law may eventually be circumvened.
What is the law, finally? Rabba bar R. Ula said, "Both are invalid," and Rabha said, "Both are valid," why? Because the twenty ells refer to the space between the ground and the crossbeam or covering, respectively, and even if part of either be above twenty ells, the space is not changed in volume. Said R. Papa to Rabha: I know of a Boraitha confirming this statement: "An entry which is more than twenty ells high and thus is higher than the door of the Temple should be lowered, and the space between the ground and the ceiling in the Temple itself was twenty ells high." R. Shimi bar R. Ashi objected to this: "We have learned further on, how should we remedy the defect in the entry? The cross-beam should be laid below the limit of the twenty ells!" Do not learn in the Boraitha, "below" but "above" the limit of the twenty ells. The Boraitha, however, distinctly teaches "below"? This "below" refers to a booth which was less than ten spans high and which must be made higher so that the space between the ground and the ceiling should be no less than ten spans, in the same manner as it must not be higher than twenty ells.
Abayi said in the name of R. Na'hman: "The ell used at a booth and at an entry measures five spans, but the ell used at Kilaim is six spans." For what legal purpose does R. Na'hman relate this? This is taught for the purpose of determining the height of an entry and for measuring a breach in the wall of an entry. (If the breach be over ten ells wide, the entry is invalid, and the ell used for measurement is the one of five spans only.) Why is the width of a breach and the height of the entry only mentioned? There is also width to be considered in an entry, for did not R. Na'hman state, that an entry must not be less than four ells wide? What ells are these? If they are four ells of the lesser standard, R. Na'hman makes the ordinance more lenient? The ells in an entry, as a rule, are those of the lesser standard, but as for the width, those of the greater standard are used. Further, R. Na'hman said, that the ell used at a booth also measures five spans. For what purpose did he state this? For the measurement of the height of the booth and the crooked walls 1 of the booth. There is also the width of the booth to be considered, however, and that should be four ells? Will not the ordinance regarding the width be made more lenient thereby of twenty spans only? The ells of a booth generally are of five spans, but as for width the ells measuring six spans are used. What does R. Na'hman intend to specify, by stating that the ells used at Kilaim measure six spans? He refers to seeds planted in the superficies of a vineyard and to a barren spot in a vineyard (as explained in Tract Kilaim). But there is a vineyard in which the vines are planted at less intervals than four ells and the opinions of the sages differ as to whether such a vineyard is called a vineyard in a legal sense (and if the ells be measured according to the statement of Na'hman it is made more lenient? Because if the four ells be of the lesser standard the commandment of Kilaim is not applied.) The statement of R. Na'hman is made for a rule but did not include the above vineyard. The ells of a vineyard are generally used of six spans, but not for the width. But Rabha said in the name of R. Na'hman: All ells measure six spans, but in Kilaim are measured with long spans and in entry and booth with short spans to make it more rigorously.
R. Hyya bar Ashi in the name of Rabh said: The several prescribed quantities (as mentioned in Tract Sabbath), the Chatzitzah