Again, thunder storms, we know, come from the westward, and apparently against an east wind. It is sometimes said they approach from the east, but it is a mistake. During thirty years attentive observation in different localities, I have never seen an instance. They sometimes _form_ over us, or just east of us, or one may form at the east and another at the west, and as they _spread out in forming_, one may seem to be coming from the east, or there may be an easterly current, with dense flocculent scud at the under surface of the shower cloud running westward, but they finally pass off to the eastward, and never to the westward. It is possible that a _patch of scud_ may become sufficiently _dense_ and _electrified_ to make a _shower_, but I have never observed one. Such an _apparent_ instance may be found recorded in "Sillman's Journal," vol. xxxix. page 57. I have seen the scud assume a distinct cumulus form, but never to become sufficiently dense to make a thunder shower. Thunder and lightning sometimes attend portions of regular storms in spring and autumn, but the thunder is always heard first in the west, and last in the east. Again, there are admitted facts with which you are conversant, which prove this proposition. When it has been raining all day, and just at night the storm has nearly all passed over to the eastward, and the sun shines under the western edge of it, and "_sets clear_," as it is termed--you say that "_it will be clear the next day_." Why? Because the storm will not pass to the westward, covering the sun and continuing, how strong soever the wind may be from the east; and because it is passing, and will continue to pass off to the eastward, leaving the sky clear. _The easterly wind will stop as soon as the storm clouds have passed, and it will fall calm, or the wind will "come out" from the westward._ So, too, when the clouds are dark in the west in the morning, and the sun rises clear, but "_goes into a cloud_," as it is expressed, you say that it will rain. And if the clouds are dense this generally proves true; because there is a storm or shower approaching from the west, and passing over to the east, the western edge of whose advance condensation has met the sun in his coming, and obscured him from your vision.