VOL. XXXII.J PHILOSOPHICAL TRANSACTIONS. 583 



clouds, about N. and by E. the sky in several places obscured with light clouds, 

 and the sun entering into one somewhat more watery, yet so as to distinguish 

 his disk. At first appeared below the sun, breaking out of the cloud, such 

 rays as are usually seen in an evening in a sky interspersed with clouds. In a 

 little time appeared at the same height with the sun, a luminous spot, about 4 

 times the size of the sun's disk, and about 30° distant from the sun to the 

 southward, which was covered with the lively shades of red and yellow on the 

 side next the sun, and increased in splendor, so as scarcely to be borne by the 

 naked eye, till it exceeded the briglitness of the sun, which was then under a 

 thin cloud, so as easily to show his disk. After this had appeared about 3 or 4 

 minutes, finding it to be a real parhelion, I began to look about for the halo, 

 they generally appear in ; and as I observed some rays resembling a glory to 

 point upwards from the sun, I saw in those rays at the same distance, being 

 about 30° perpendicularly above the sun, the colours of the halo appearing as 

 in the luminous spot; but instead of finding it, as I expected, in a circle sur- 

 rounding the sun, it was inverted, yet not circular, but making an obtuse 

 angle, the point towards the sun. I then looked to the northward of the sun, 

 and as the cloud, which was thicker on that side, moved southwardly, a lumi- 

 nous spot began to appear at the same distance from the sun as the other, and 

 in the same parallel of altitude, which had the same colours towards the sun, 

 and increased in brightness, but not equal to the brightness of the other spot, 

 yet was as luminous as the sun then appeared: this spot was very little larger 

 than the sun's disk. As the cloud moved on, till it came to about 6o^ to the 

 southward of the sun, and 30° from the spot, at an equal height there appeared 

 another spot, tinged with the colours of the rainbow. The whole appearance 

 lasted a quarter of an hour. The reason of my not seeing the halos, which 

 generally appear with them, was, that there was a good deal of clear sky above 

 the sun, and the cloud was too thick below it. 



Concerning the Particles of Fat, By Mr. Leuivenhoeck^ F.R. S. N° 3/2, p. 03. 



I have formerly said, that the matter which we call meal or flour, in wheat, 

 rye, barley, oats, and in all sorts of beans, is shut up as it were in little cells, 

 separated from each other by thin membranes, which are thinnest in wheat. 

 And as, in the inquiry into what is called the periosteum of an ox or sheep, I 

 have often broke in pieces the fat particles, and viewed through a microscope the 

 broken particles, so I have likewise placed a few of the fat globules on a clean 

 glass plate, and afterward held it over a coal fire, or the flame of a candle, till 

 they were all melted and reduced into a liquid matter; so that not only the fat, 



