carried to the place whence it is launched and hence is subject to defilement; as R. Hanina b. Aqa'bbia said: Why did the rabbis say that a small (river) boat is subject to defilement? Because it is usually loaded in the dry dock and then carried into the river.
Rabbi Johanan in the name of Rabbi said: "One should not absent himself from the college even for one hour. Behold, this teaching (concerning a river boat) has been taught in the schools for many years and no one knew the reason for it until R. Hanina b. Aqa'bbia came and explained it."
R. Jonathan said: One should never absent himself from the house of learning or abstain from learning the law, even when at the point of death, for it is written [Num. xix. 14]: "This is the law, when a man dieth in his tent"; (i.e.) even at the point of death man must occupy himself with the study of the law. Resh Lakish, however, adduces from the same verse that one does not retain (in memory) the law, unless he is ready to die for it.
Mishna III.: (R. Aqiba said:) Whence do we adduce that in a patch of ground six spans long by six spans wide five different kinds of seed may be planted—one kind each in each of the four corners and one in the centre of the patch? From the passage [Isaiah, lxi. 11]: "For as the earth bringeth forth her growth, and as a garden causeth what is sown therein to spring forth." (We see then) it is not written "as a garden causeth its seed to spring forth," but what is sown therein.
Gemara: How is this to be understood from that passage? Said R. Jehudah: The passage cited in the above Mishna is to be thus explained: "The earth bringeth forth her growth." "Bringeth forth" (which is in the singular) can be counted for "one" (kind of seed). Her "growth" (also singular) can also be counted for "one." (Now we have two.) "What is grown therein" (evidently plural) can be counted for two more (making four), and "to spring forth" (in the singular again) can be counted as one, making five in all; and (as far as the six spans square are concerned) the rabbis are quite certain (through tradition) that five different kinds of seed in a patch six spans square do not interfere with one another. But whence do we know that the assurance of the rabbis can be depended upon? Answered R. Hyya b. Aba in the name of R. Johanan, from the passage [Deut. xix. 14]: "Thou shalt not remove the landmark of thy neighbor, which they of old time have set," which is to be explained: "Thou shalt not go beyond what is limited by those
