(From Keferstein.) D, Anion ater, the great black slug.
In other slugs, namely, Limax and Anion, the shell-sac remains permanently closed over the shell-plate, which in the latter genus consists of a granular mass of carbonate of lime.
The larger black slugs are species of Anion, of which two are British, A.
Here the ions are potassium and the group Ag(CN)2.1 Each potassium ion as it reaches the cathode precipitates silver by reacting with the solution in accordance with the chemical equation K--+KAg(CN) 2 =2KCN+Ag, while the anion Ag(CN) 2 dissolves an atom of silver from the anode, and re-forms the complex cyanide KAg(CN) 2 by combining with the 2KCN produced in the reaction described in the equation.
If the anode consist of platinum, cyanogen gas is evolved thereat from the anion Ag(CN) 2, and the platinum becomes covered with the insoluble silver cyanide, AgCN, which soon stops the current.
But if one ion, say the anion, travels faster through the liquid than the other, the end of the solution from which it comes will be more exhausted of salt than the end towards which it goes.
It is usual to express the results in terms of what is called the migration constant of the anion, that is, the ratio of the amount of salt lost by the anode vessel to the whole amount lost by both vessels.
On the theory that the phenomena are wholly due to unequal ionic velocities this result would mean that the cation like the anion moved against the conventional direction of the current.
When the solutions may be taken as effectively dilute, so that the gas laws apply to the osmotic pressure, this relation reduces to E _ nrRT to c1 ey gE c2 where n is the number of ions given by one molecule of the salt, r the transport ratio of the anion, R the gas constant, T the absolute temperature, y the total valency of the anions obtained from one molecule, and c i and c 2 the concentrations of the two solutions.
As we have seen above, when a solution is placed in contact with water the water will take a positive or negative potential with regard to the solution, according as the cation or anion has the greater specific velocity, and therefore the greater initial rate of diffusion.
75, 123) Pegasus, like Anion the fabled offspring of Demeter and Poseidon, was a curse-horse, symbolical of the rapidity with which curses were fulfilled.
Nothing is known of the life of Anion, with the exception of the beautiful story first told by Herodotus (i.
According to Herodotus, Anion being desirous of exhibiting his skill in foreign countries left Corinth, and travelled through Sicily and parts of Italy, where he gained great fame and amassed a large sum of money.
Anion chose the latter, and as a last favour begged permission to sing a parting song.
He was at first incredulous, but eventually learned the truth.
They affirmed that he had remained behind at Tarentum; upon which they were suddenly confronted by Anion himself, arrayed in the same garments in which he had leapt overboard.
25.7) both refer to a brass figure at Taenarum which was supposed to represent Anion seated on the dolphin's back.
Schlegel; see also Lehrs, Populcire Aufsatze aus dem Alterthum (1844-1846); Clement, Anion (1898).
The Romans are credited with having purposely introduced the edible snail (Helix pomatia) into England, and the common garden snail and slugs (Helix aspersa, Limax agrestis and Anion hortensis) have been unwittingly established in New Zealand.
Periander further appears as a patron of literature, for it was by his invitation that the poet Anion came to Corinth to organize the dithyramb.