"Those unguents which have a taste of earth are better," says Cicero, "than those which smack of saffron," it seeming to him more to the purpose to express himself by the word taste than smell. And such is the fact no doubt, that soil is the best which has the savour of a perfume. If the question should be put to us, what is this odour of the earth that is held in such estimation; our answer is that it is the same that is often to be recognized at the moment of sunset without the necessity even of turning up the ground, at the spots where the extremities of the rainbow have been observed to meet the earth: as also, when after long continued drought, the rain has soaked the ground. Then it is that the earth exhales the divine odour that is so peculiarly its own, and to which, imparted to it by the sun, there is no perfume however sweet that can possibly be compared. It is this odour which the earth, when turned up, ought to emit, and which, when once found, can never deceive any person: and this will be found the best criterion for judging of the quality of the soil. Such, too, is the odour that is usually perceived in land newly cleared when an ancient forest has been just cut down; its excellence is a thing that is universally admitted.]
[Footnote 66: The actus was the head land or as much land as a yoke of oxen could plough at a single spell without stopping, and measured 120 feet in length and four feet in width. Cf. Pliny, H.N. XVIII, 3. Hence the square of the head land became the basis of the Roman land measure. With the derivation of the actus may be compared that of the English furlong (furrow-long) and the French arpent (literally, head land).]
[Footnote 67: On the socialistic principle of Strepsiades in Aristophanes' Clouds that the use of geometry is to divide the land into equal parts.]
[Footnote 68: As it is difficult to appreciate that the Roman Campagna was formerly populous with villas, when one contemplates its green solitudes today, so when one faces the dread malaria which there breeds, one wonders how the Romans of the Republic maintained so long their hardy constitutions. It is now agreed that there was no malaria in the Land of Saturn so long as the volcanos in the Alban hills were active, because their gases purified the air and kept down the mosquitoes, and geology tells us that Monte Pila was in eruption for two or three centuries after the foundation of Rome. By the beginning of the second century B.C. the fever seems to have become endemic. Plautus and Terence both mention it and Cato (CLVII) describes its symptoms unmistakably. In his book on the effect of malaria in history, W.H. Jones expresses the opinion that the malady was brought into Italy from Africa by Hannibal's soldiers, but it is more probable that it was always there. See the discussion in Lanciani's Wanderings in the Roman Campagna. In Varro's time the Roman fever had begun to sap the vitality of the Roman people, and the "animalia minuta" in this passage suggests that Varro had a curious appreciation of what we call the modern science of the subject. Columella (I, 5, 6) indeed specifically mentions mosquitoes (infestis aculeis armata animalia) as one of the risks incident to living near a swamp.]
[Footnote 69: In the thirteenth century Ibn-al-Awam, a learned Moor, wrote at Seville his Kitab al-felahah, or Book of Agriculture, which has preserved for us not only the wisdom of the Moorish practice in agriculture and gardening which made Spain an enchanted paradise, but also the tradition of the Arabs in such matters, purporting to go back, through the Nabataeans to the Chaldaean books, which recorded the agricultural methods that obtained "by the waters of Babylon." Ibn-al-Awam's book has, therefore, a double interest for us, and we are fortunate in having it available in an admirable French translation from the Arabic by J.J. Clement-Mullet (Paris, Librairie A. Franck, 1864). Not the least profitable chapters in this book are those devoted to the preparation of manure in composts, to be ripened in pits as Varro advises in the text. They show a thoroughness, a care and an art in the mixing of the various animal dungs, with straw, woodsearth and cinders, which few modern gardeners could equal. German scholarship has questioned the Chaldaean origin of the authorities quoted, but there is internal evidence which smacks of an oriental despotism that might well be Babylonian. In a recipe for a rich compost suitable for small garden plants, we are advised (I, 2, I, p. 95), without a quiver, to mix in blood—that of the camel or the sheep if necessary—but human blood is to be preferred!]
[Footnote 70: What Varro describes as the military fence of ditch and bank was doubtless the typical Herefordshire fence of modern England which Arthur Young, in The Farmers' Letters, recommends so highly as at once most effective and most economical. The bank is topped with a plashed hedge of white thorn in which sallow, ash, hazel and beech are planted for "firing." The fencing practice of the American farmer has followed the line of least resistance and is founded on the lowest first cost: the original "snake" fences of split rails, upon the making of which a former generation of pioneer American boys qualified themselves for Presidential campaigns, being followed by woven wire "made by a trust" and not the most enduring achievement of Big Business. The practical farmer, as well as the lover of rural scenery, has cause for regret that American agricultural practice has not yet had the patience to enclose the land within live hedges and ditches.]
[Footnote 71: The kind of fence which Varro here describes as "ex terra et lapillis compositis in formis" is also described by Pliny (H.N. XXXV, 169), as formaceos or moulded, and he adds, "aevis durant." It would thus clearly appear to have been of gravel concrete, the use of which the manufacturers of cement are now telling us, is the badge of the modern progressive farmer. Cato (XXXVIII) told how to burn lime on the farm, and these concrete fences were, of course, formed with lime as the matrix. When only a few years ago, Portland cement was first produced in America at a cost and in a quantity to stimulate the development of concrete construction, engineers began with rough broken stone and sand as the constituents of what they call the aggregate, but some one soon "discovered" that the use of smooth natural gravel made more compact concrete and "gravel concrete" became the last word in engineering practice. But it was older even than Varro. A Chicago business man visiting Mycenae picked up and brought home a bit of rubbish from Schliemann's excavations of the ancient masonry: lying on his office desk it attracted the attention of an engineering friend who exclaimed, "That is one of the best samples of the new gravel concrete I have seen. Did it come out of the Illinois tunnel?" "No," replied the returned traveller, "it came out of the tomb of Agamemnon!">[
[Footnote 72: Varro here seems to forget the unities. He speaks in his own person, when Scrofa has the floor.]
[Footnote 73: It will be recalled that Aristotle described slaves as living tools. In Roman law a slave was not a persona but a res. Cf. Gaius II, 15.]
[Footnote 74: One of the most interesting of these freemen labourers of whom we know is that Ofellus whom Horace (Satire II, 2) tells us was working with cheerful philosophy as a hired hand upon his own ancestral property from which he had been turned out in the confiscations following the battle of Philippi. This might have been the fate of Virgil also had he not chanced to have powerful friends.]