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One position held by the philosophers of my sect I neither venture to adopt on account of its seeming weakness, nor yet can I pass it by without mention. Where can be the harm of suggesting even an improbable explanation when one has such an indulgent judge? If we are to apply a test like the pyx to every argument, we shall soon cease to advance any hypothesis at all and be reduced to dumbness. There are very few statements that pass unchallenged. All the rest have to assert their rights before they can win their case. Well, the assertion of the Stoics is, that all the ice-bound region about Scythia and Pontus and the northern quarter is released from its chain in spring; then the frozen rivers resume their course, then the mountains melt the snows in which they have been buried. It is quite conceivable, therefore, that cool airs arise from this and mingle with the atmosphere of spring. They add a proof which I have never tested nor have any intention of testing. You, too, I fancy, however anxious you may be to ascertain the truth, will be cautious about making such a trial of snow. The feet are said to suffer less pain when one treads on hard, solid snow than if the snow were slushy and half melted. Well, then, if the Stoics do not lie, all the currents of air wafted from those northern parts, when the snow has now been dislodged and the ice is breaking up, condense and bind the atmosphere of the southern region which is already becoming warm and moist. So what was going to be rain becomes, through the violence done by the cold, hail instead.