This operation, too, was a very expensive one in ancient times. In those days the only whetstones[527] known were those of Crete and other places beyond sea, and they only used oil to sharpen the scythe with. For this purpose the mower moved along, with a horn, to hold the oil, fastened to his thigh. Italy has since furnished us with whetstones which are used with water, and give an edge to the iron quite equal to that imparted by the file; these water-whetstones, however, turn green very quickly. Of the scythe[528] there are two varieties; the Italian,[529] which is considerably shorter than the other, and can be handled among underwood even; and the Gallic, which makes quicker work[530] of it, when employed on extensive domains, for there they cut the grass in the middle only, and pass over the shorter blades. The Italian mowers cut with one hand only. It is a fair day’s work for one man to cut a jugerum of grass, and for another to bind twelve hundred sheaves of four pounds each. When the grass is cut it should be turned towards the sun, and must never be stacked until it is quite dry. If this last precaution is not carefully taken, a kind of vapour will be seen arising from the rick in the morning, and as soon as the sun is up it will ignite to a certainty, and so be consumed. When the grass has been cut, the meadow must be irrigated again, for the purpose of ensuring a crop in the autumn, known to us as the “cordum,” or aftermath. At Interamna in Umbria the grass is cut four times[531] a-year, and this although the meadows there are not irrigated,—in most places, three. After all this has been done, too, the pasturage of the land is found no less lucrative than the hay it has produced. This, however, is a matter of consideration for those more particularly who rear large herds of cattle, and every one whose occupation it is to breed beasts of burden, will have his own opinions upon the subject: it is found, however, the most lucrative of all by those whose business it is to train chariot-horses. CHAP. 68.—THE SUMMER SOLSTICE. We have already stated[532] that the summer solstice arrives at the eighth degree of Cancer, and upon the eighth day before[533] the calends of July: this is an important crisis in the year, and of great interest to the whole earth. Up to this period from the time of the winter solstice the days have gone on increasing, and the sun has continued for six months making his ascension towards the north; having now surmounted the heights of the heavens, at this point he reaches the goal, and after doing so, commences his return towards the south; the consequence of which is, that for the next six months he increases the nights and subtracts from the length of the days. From this period, then, it is the proper time to gather in and store away the various crops in succession, and so make all due preparations for the rigour and severity of the winter.