Staple Dietary Ingredients Secured | My Web Site Page 021 Chapter 02 Page 01

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While the Roman legions in the East were acquiring wealth and winning easy conquests, their less fortunate comrades in the West were carrying on a severe struggle with the warlike Gauls, Ligurians, and Spaniards. The Romans had hardly concluded the Second Punic War when they received intelligence that Hamilcar, a Carthaginian officer, had excited several tribes in Northern Italy to take up arms against Rome. These were the Gauls on both sides of the Po, and the Ligurians, a race of hardy mountaineers, inhabiting the upper Apennines and the Maritime Alps. They commenced the war in B.C. 200 by the capture and destruction of the Roman colony of Placentia, and by laying siege to that of Cremona, the two strong-holds of the Roman dominion in Northern Italy. The Romans now set themselves to work, with the characteristic stubbornness of their nation, to subdue thoroughly these tribes. The Insubres and the Cenomani, to the north of the Po, were the first to yield; but the Boii resisted for some years all the efforts of the Romans, and it was not till B.C. 191 that the Consul P. Cornelius Scipio Nasica received their final submission.

In sea-urchins we often find two creatures superficially indistinguishable, but the one is a female with large ovaries and the other is a male with equally large testes. Here the physiological difference does not affect the body as a whole, but the reproductive organs or gonads only, though more intimate physiology would doubtless discover differences in the blood or in the chemical routine (metabolism). In a large number of cases, however, there are marked superficial differences between the sexes, and everyone is familiar with such contrasts as peacock and peahen, stag and hind. In such cases the physiological difference between the sperm-producer and the ovum-producer, for this is the essential difference, saturates through the body and expresses itself in masculine and feminine structures and modes of behaviour. The expression of the masculine and feminine characters is in some cases under the control of hormones or chemical messengers which are carried by the blood from the reproductive organs throughout the body, and pull the trigger which brings about the development of an antler or a wattle or a decorative plume or a capacity for vocal and saltatory display. In some cases it is certain that the female carries in a latent state the masculine features, but these are kept from expressing themselves by other chemical messengers from the ovary. Of these chemical messengers more must be said later on.

This illustration is entirely apt, the only difference between the two cases consisting in the fact that the variation in the flower is not a useful, but a disadvantageous one, which can only be preserved by artificial selection on the part of the gardener, while the transformations that have taken place parallel with the sterility of the ants are useful, since they procure for the colony an advantage in the struggle for existence, and they are therefore preserved by natural selection. Even the sterility itself in this case is not disadvantageous, since the fertility of the true females has at the same time considerably increased. We may therefore regard the sterile forms of ants, which have gradually been adapted in several directions to varying functions, _as a certain proof_ that selection really takes place in the germ-cells of the fathers and mothers of the workers, and that _special complexes of primordia_ (_ids_) are present in the workers and in the males and females, and these complexes contain the primordia of the individual parts (_determinants_). But since all living entities vary, the determinants must also vary, now in a favourable, now in an unfavourable direction. If a female produces eggs, which contain favourably varying determinants in the worker-ids, then these eggs will give rise to workers modified in the favourable direction, and if this happens with many females, the colony concerned will contain a better kind of worker than other colonies.

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