The subject of reflected light and its colors has long agitated the scientific mind. Much has been said and written; elaborate and laborious "Essays," "Researches" and "Treatises" have penetrated our libraries and proved valuable auxiliaries in pushing the interest of those engaged in furthering agricultural and chemical pursuits. This branch of natural science is regarded as one of the most important, and, at the present moment, it is rendered doubly interesting from the fact of Mr. Hill's discovery. We may look forward for new developments, which will prove no less surprising than that of rendering permanent, on a metallic plate, the variegated beauties of the solar spectrum. We are, as it were, standing upon an eminence from which we can survey the present, retrospect the past, and almost sketch the bright outline of a coming future. Here lies a field for animated speculation, in which nature's student can satiate his appetite in the study of nature, in a province hitherto unknown and unexplored; he may here realize truths purely sublime, painted in the glowing "colors of nature," and rendered prominent upon the tablet of his memory. We present the following communication from Mr. Hill, which our readers will peruse with pleasure: * * * * * For the Daguerreian Journal. S. D. Humphrey, Esq.;--Being detained here a day on my way from your city, I relieve myself a little from the tedium of delay, by a few scribblings to your valuable Journal. I will give a few particulars respecting my pictures, &c. I have now fifty-five specimens. They are all equally perfect. It is quite remarkable that I have never yet made a partial failure. Those impressions which have had too much light, are nearly as strong, sound, brilliant and beautiful as those correctly timed in the camera, being inferior only in having the colors less deep. Even the whites retain their strength. The folds of the linen are always well defined. Blue or solarized linen is unknown in my process, and there is always a strength and clearness in the whites, unattainable by mercury. During the past winter I have several times taken a view in which there is a deep red house, while the ground was covered with snow. For experiment I exposed the plate so long as to reduce the bright red of the house to a _very light red_, while at the same time, the white snow was developed with a beautiful whiteness.