Pliny's thoughts on Menstration

Over and above these particulars, there is no limit to the marvellous powers attributed to females. For, in the first place, hailstorms, they say, whirlwinds, and lightning [Note] even, will be scared away by a woman uncovering her body while her monthly courses are upon her. The same, too, with all other kinds of tempestuous weather; and out at sea, a storm may be lulled by a woman uncovering her body merely, even though not menstruating at the time. As to the menstrual discharge itself, a thing that in other respects, as [Note] already stated on a more appropriate occasion, is productive of the most monstrous effects, there are some ravings about it of a most dreadful and unutterable nature. Of these particulars, however, I do not feel so much shocked at mentioning the following. If the menstrual discharge coincides with an eclipse of the moon or sun, the evils resulting from it are irremediable; and no less so, when it happens while the moon is in conjunction with the sun; the congress with a woman at such a period being noxious, and attended with fatal effects to the man. At this period also, the lustre of purple is tarnished by the touch of a woman: so much more baneful is her influence at this time than at any other. At any other time, also, if a woman strips herself naked while she is menstruating, and walks round a field of wheat, the caterpillars, worms, beetles, and other vermin, will fall from off the ears of corn. Metrodorus of Scepsos tells us that this discovery was first made in Cappadocia; and that, in consequence of such multitudes of cantharides being found to breed there, it is the practice for women to walk through the middle of the fields with their garments tucked up above the thighs. [Note] In other places, again, it is the usage for women to go barefoot, with the hair dishevelled and the girdle loose: due precaution must be taken, however, that this is not done at sun-rise, for if so, the crop will wither and dry up. Young vines, too, it is said, are injured irremediably by the touch of a woman in this state; and both rue and ivy, plants possessed of highly medicinal virtues, will die instantly upon being touched by her.

Much as I have already stated on the virulent effects of this discharge, I have to state, in addition, that bees, it is a well-known fact, will forsake their hives if touched by a menstruous woman; that linen boiling in the cauldron will turn black, that the edge of a razor will become blunted, and that copper vessels will contract a fetid smell and become covered with verdigrease, on coming in contact with her. A mare big with foal, if touched by a woman in this state, will be sure to miscarry; nay, even more than this, at the very sight of a woman, though seen at a distance even, should she happen to be menstruating for the first time after the loss of her virginity, or for the first time, while in a state of virginity. The bitumen [Note] that is found in Judæa, will yield to nothing but the menstrual discharge; its tenacity being overcome, as already stated, by the agency of a thread from a garment which has been brought in contact with this fluid. Fire itself even, an element which triumphs over every other substance, is unable to conquer this; for if reduced to ashes and then sprinkled upon garments when about to be scoured, it will change their purple tint, and tarnish the brightness of the colours. Indeed so pernicious are its properties, that women themselves, the source from which it is derived, are far from being proof against its effects; a pregnant woman, for instance, if touched with it, or indeed if she so much as steps over it, will be liable to miscarry.[1]