The use of lime in mortar, is to fill up the hollow spaces or vacuities
between the grains of sand, and to cement them together, thereby forming
a kind of artificial stone. To add any more lime than is sufficient to
fill up these spaces, seems to be useless, and to add much more must
weaken the mortar; but, if too little lime be used, there will be
cavities left between some of the grains of sand, and the mortar will
consequently be short or brittle: therefore, when we cannot ascertain
the best proportions of lime and sand, it is better to use too much lime
than too little.--_Ibid._


_Treatment of Gold and Silver Fish._

These beautiful objects of the animal kingdom, though long ago
introduced into Europe from China, their native country, seldom breed in
such numbers as they might be expected to do. It has been lately
discovered that in ponds heated by waste water discharged from steam
factories, the gold and silver fish breed abundantly. From this
circumstance, it has been suggested, that, as heating hothouses by warm
water is now so generally adopted, a portion of this, led occasionally
into a garden basin, would keep the water in such a temperament as would
not only always be agreeable to the fish, but promote their
breeding.--_Ibid._


_Climate._

Professor Schow, of Copenhagen, has lately read a paper "On the supposed
Changes in the Climate of the different parts of the Earth, during the