If the appearance of the pregnant clouds should be marked by meteoric falls, by thunderbolts, duststorms and the appearance of mock-fires about the horizon; or if at the time of such appearance, clouds should present the shape of cities and towers and if spots should appear in the solar disc or if there should be planetary conjunctions at the time; or if there should be a shower of blood, if halos or rainbows should appear in the sky, if there should be a solar or lunar eclipse at the time, in all these cases the pregnancy will miscarry.