condensed part drawing up to the cloud. Yet still the tube, or whirl of air, may remain entire, the middle only becoming invisible, as not containing visible matter.Dr. Stuart say«, " It was observable of all the spoGhd Hair Straightenersuts he saw, but more perceptible of the great one j that, towards the end, it began to appear like a hollow canal, only black in the borders, but white in the middle ; and though at first it was altogether blackGhd Straighteners and opaque, yet, now, one could very dis Hair Straightenerstinctly perceive the sea water to fly up along the middle of this canal, as smoke up a chimney."And Dr. Mather, describing a whirlwind, says, " a thick dark small cloud arose, with a pillar of light in it, of about eight or ten feet diameter, and passed along the ground in a tract not wider than a street, horribly tearing up trees by the roots, blowing them up in the air like feathers, and throwing upNFL Jerseys Youth stones of great weight to a considerable height in the air, &c."These accoghd mk4 stylerunts, the one of water-spouts, the other of a whirlwind, seem, in this particular, to agree ; what one gentleman describes as a tube, black in the borders, and white in the middle, the other calls a black cloud, with a pillar of light in it; the latter expression has only a little more of the marvellous, but the thing is the same ; and it seems not very difficult to understand. When Dr. Stuart's spouts were full charged, that is, when the whirling pipe of air was filled between a a a a and b b b b, Fig. I. with quantities of drops, and vapor torn off from the column VV WFig. II, thghd iv stylere whole was rendered so dark, as that it could not be seen through, nor the spiral ascending motion discovered; but when the quantity ascending lessened, the pipe became more transparent, and the ascending motion visible. For by inspection of the figure given in NFL Jerseys Wholesalethis page, representing a section of our spout, with the vacuum in the middle, it is plain that if we look at such a hollow pipe in the direction of the arrows, and suppose opaque particles to be equally mixed in the space between the two circular lines, both the part NFL Jerseys Authentic between the arrows a and b, and that between the arrows c and d, will appear much darker than that between b and c, as there must be many more of those opaque particles in the line of vision across the sides,