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"Ha!" exclaimed the Professor, again smiling blandly, "there you have touched what once was, and, to some philosophers it seems, still is, the great difficulty. By some great men it has been held that glacier ice is always in a partially soft, viscid, or semi-fluid condition, somewhat like pitch, so that, although apparently a solid, brittle, and rigid body, it flows sluggishly in reality.
First, I shall observe that Yeast is a very strong acid, that abounds with subtil spirituous Qualities, whose Particles being wrapped up in those that are viscid, are by a mixture with them in the Wort, brought into an intestine Motion, occasion'd by Particles of different Gravities; for as the spirituous Parts of the Wort will be continually striving to get up to the Surface, the glutinous adhesive ones of the Yeast will be as constant in retarding their assent, and so prevent their Escape; by which the spirituous Particles are set loose and free from their viscid Confinements, as may appear by the Froth on the Top, and to this end a moderate warmth hastens the Operation, as it assists in opening the viscidities in which some spirituous Parts may be entangled, and unbends the Spring of the included Air: The viscid Parts which are raised to the Top, not only on account of their own lightness, but by the continual efforts and occursions of the Spirits to get uppermost, shew when the ferment is at the highest, and prevent the finer Spirits making their escape; but if this intestine Operation is permitted to continue too long, a great deal will get away, and the remaining grow flat and vapid, as Dr.
But a similar cause can hardly apply to the separation of the crystals of these lava-streams. The sinking of crystals through a viscid substance like molten rock, as is unequivocally shown to have been the case in the experiments of M. Dree, is worthy of further consideration, as throwing light on the separation of the trachytic and basaltic series of lavas. Mr.
He observed universally within the cell "an opaque, viscid fluid, having granules intermingled in it," which made up the main substance of the cell, and which particularly impressed him because under certain conditions it could be seen to be actively in motion, its parts separated into filamentous streams.
He gave me coffee, dried Soudan beef cut up into shreds, and some of the Soudan almonds. These almonds are not fine flavoured like those of the north, but are viscid, rancid, and bitter. Nor are they of the same beautiful filbert-form, but of clumsy oval and double-oval shapes. The shell is soft, and can be broken easily with the fingers.
This operation, which requires several months for its completion, yields such a bad, dark-brown, and viscid product that the pitcher fetches only two dollars and a quarter in Manila, while a superior oil costs six dollars. A winch, turned by two carabaos, sets a number of rasps in motion by means of toothed wheels and leather straps.
The pollen is, moreover, peculiar, being collected into more or less compact masses, and variously concealed in the flower. Some of these are club-shaped, with a viscid extremity, others of the consistency of a sticking-plaster, and all are hidden from external view in pouches and pockets, from which they never emerge unless withdrawn on the body of an insect.
Various figs, ranging in size from a large red currant to a tennis-ball, and in colour from white through all the tints from pale yellow and green to red, purple and black, sweet and generally mawkish. The scape of the ELETTARIA SCOTTIANA, oozing viscid nectar, might stand as a sweetmeat.
Glass beads and bits of tile, which had been strewed on the surface of the soil, were stuck into the interstices between the pine-leaves; and these interstices were likewise plastered with the viscid castings voided by the worms. The structures thus formed cohered so well, that I succeeded in removing one with only a little earth adhering to it.
The spicy resin which flowed from the ancient pines attracted hosts of insects, which, tempted by their hope of food, met their death caught and slowly but surely enclosed by the viscid sap, each antenna and hair as perfect as when the insect was alive.
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