The guests of the neighboring hotels, as they dally with their morning's omelet, little imagine what varied uses come out of the shells which furnished them their anticipatory repast of disappointed chickens. If they had visited Mr. Anthony's upper rooms, they would have seen a row of young women before certain broad, shallow pans filled with the glairy albumen which once enveloped those potential fowls. The one next us takes a large sheet of photographic paper, (a paper made in Europe for this special purpose, very thin, smooth, and compact,) and floats it evenly on the surface of the albumen. Presently she lifts it very carefully by the turned-up corners and hangs it _bias_, as a seamstress might say, that is, cornerwise, on a string, to dry. This "albumenized" paper is sold most extensively to photographers, who find it cheaper to buy than to prepare it. It keeps for a long time uninjured, and is "sensitized" when wanted, as we shall see by-and-by. The amount of photographic paper which is annually imported from France and Germany has been estimated at fifteen thousand reams. Ten thousand native partlets-- "_Sic vos non vobis nidificatis, aves_"-- cackle over the promise of their inchoate offspring, doomed to perish unfeathered, before fate has decided whether they shall cluck or crow, for the sole use of the minions of the sun and the feeders of the caravanseras. In another portion of the same establishment are great collections of the chemical substances used in photography. To give an idea of the scale on which these are required, we may state that the estimate of the annual consumption of the precious metals for photographic purposes, in this country, is set down at ten tons for silver and half a ton for gold. Vast quantities of the hyposulphite of soda, which, we shall see, plays an important part in the process of preparing the negative plate and finishing the positive print, are also demanded. In another building, provided with steam power, which performs much of the labor, is carried on the great work of manufacturing photographic albums, cases for portraits, parts of cameras, and of printing pictures from negatives. Many of these branches of work are very interesting. The luxurious album, embossed, clasped, gilded, resplendent as a tropical butterfly, goes through as many transformations as a "purple emperor". It begins a pasteboard larva, is swathed and pressed and glued into the condition of a chrysalis, and at last alights on the centre table gorgeous in gold and velvet, the perfect _imago_. The cases for portraits are made in lengths, and cut up, somewhat as they say ships are built in Maine, a mile at a time, to be afterwards sawed across so as to become sloops, schooners, or such other sized craft as may happen to be wanted.