Hence it follows that the gelatine plate is acted upon by light only on the parts corresponding to the ridges; and in these parts the gelatine is rendered insoluble, while all the rest of the gelatine is soluble.

The engineer hastily tore away the paper and took up five or six glass photographic negatives, of a half-plate size, which were damp, and stuck together by the gelatine films in couples.

For mounting prints upon developed gelatine paper, it has been recommended to cement the edges only, so as to leave the greater part of the print with its enamel surface.

Other experiments, by excluding air from the gelatine cultures, or placing them under an exhausted bell jar, or in an atmosphere of carbonic acid, went to prove that they required air and oxygen for their growth; but the deprivation did not kill them, since on removing them from these conditions they again began to grow.

Another peculiarity was the slowness with which the gelatine liquefied, and the narrow limits of this liquefaction in the case of a gelatine disk.

It must be remembered that for gelatine emulsion we are not nearly so limited in the selection of paper as when it is required to be albumenized.

In its further growth the gelatine is liquefied in the vicinity of the colony, which at the same time sinks down deeper into the gelatine mass, and makes a small thread-like excavation in the gelatine, in the center of which the colony appears as a small white point.

Then add the gelatine mixture, which should first be strained, the whites of the two eggs beaten stiff, and a little vanilla for flavoring.

It must be confessed that roller slide experiments which we have made with sensitive films supported on gelatine sheets, or on such composite sheets as the alternate rubber and collodion pellicle of Mr. Warnerke, have been hardly satisfactorypossibly, however, from our own want of skill; while no form of the Calotype process which we have tried has proved so satisfactory as gelatino-bromide paper.

Meanwhile, have some strips of vegetable gelatine soaking, pour off the water, and bring to boil in a cupful well-seasoned stock, "Extract," gravy, &c. Stir till gelatine is dissolved, and when the pie is removed from the oven, pour this in.

Now while these proportions may be the best for the development of a negative, they are not, according to my experience, the best for gelatine bromide positive enlargements; I find, indeed, that potassic oxalate should not have more than one-eighth of the ferrous sulphate solution added to it, otherwise it will not hold in proper solution for any length of time the compound salt formed when the two are mixed.

Festival, April 4. ISINGLASS, a gelatine substance prepared from the sounds or air-bladders of certain fresh-water fishes, the sturgeon in particular; it is imported from Russia, Brazil, and the Hudson Bay Territory.

From this he drew a tightly corked bottle, filled with gelatine capsules.

He rose at the end of five minutes' sombre meditation, holding the curling gelatine card of his choice in his warm hand.

Pistachio ice-cream accompanied the cake, but vanilla ice-cream or a green gelatine dessert would be equally fitting.