Whoever has travelled from Calais to Paris must have noticed the lank, greyhound-like forms of the French pigs; but it is not perhaps generally known that the Chinese and English breeds are getting into use for crossing. The fact that there are four millions of pigs yearly killed in France, shows of how great importance they are to agriculturists.
Indian Plaster.
All the fine plaster with which the walls of the houses are covered in India, and which is so much admired by strangers, is composed of a mixture of fine lime and soapstone, rubbed down with water: when the plaster is nearly dry, it is rubbed over with a dry piece of soapstone, which gives it a polish very much resembling that of well-polished marble.
Method of preserving Currants fresh till January or February.
When the fruit is ripe, choose those bushes enjoying a southern aspect, and which are most convenient in their shape, and most loaded with fruit, and surround them with thick straw mats, so that they shall be completely sheltered from atmospheric cold and other changes. By this simple method it will be found that the fruit may be preserved quite fresh till after Christmas.
H.B.A.
Chromate of Iron.
Is used in painting, dyeing, and calico-printing; and its value is so great, the proprietor of a serpentine tract in Shetland, where chromate of iron was found by Professor Jameson, cleared, in a few years, 8,000l.—Dr. Murray.
Temperature of Springs.
In those situations where the cold is not sufficient to hinder the circulation of water, the temperature of perennial springs is almost identical with the atmosphere. Thus, in the vicinity of Edinburgh, the temperature of the perennial springs agrees with the mean temperature of the atmosphere. The same is the case in the whole of Atlantic Europe, and also to a great extent in Southern Europe. The temperature of springs in northern regions, when the surface water is frozen, is higher than the mean temperature of the superincumbent atmosphere; and in the countries from the south of Europe to the Tropic, the temperature of springs is lower than that of the medium temperature of the atmosphere.