9TH FEBRUARY.--The leisure we enjoyed at this camp, enabled us to bestow more attention on the vegetable and animal productions of these remarkable plains, than had been given during my former journey. It appeared that the saltwort plants, which were numerous, were not only efficacious in keeping the cattle that fed on them in the best possible condition; but as wholly preventing cattle and sheep from licking clay, a vicious habit to which they are so prone, that grassy runs in the higher country nearer Sydney are sometimes abandoned only on account of the "licking holes" they contain. It is chiefly to take off that taste for licking the saline clay, that rock-salt is in such request for sheep, lumps of it being laid in their pens for this purpose. At all events, it is certain that by this licking of clay both sheep and cattle are much injured in health and condition, losing their appetite for grass, and finally passing clay only, as may be seen near such places. In the salt plants on these plains, nature has amply provided for this taste of these large herbivora for salt. Our sheep nibbled at the mesembryanthemum, and the cattle ate greedily of various bushes whereof the leaf was sensibly salt to the taste. The colour of the leaves of such bushes is usually a very light bluish green, and there are many species. That with the largest leaves, called salt-bush by stockmen, and by Dr. Brown RHAGODIA PARABOLICA, was very useful as a vegetable after extracting the salt sufficiently from it. This we accidentally discovered from some experiments made by Mr. Stephenson, for the purpose of ascertaining the proportion of salt contained in the leaves. The leaves contained as much as a twentieth part of salt, nearly two ounces having been obtained from two pounds of the leaves.[*] We also found that after twice boiling the leaves a few minutes in water to extract the salt, and then an hour in a third water, the leaves formed a tender and palatable vegetable, somewhat resembling spinach. As the superior excellence of these runs for fattening cattle is admitted on all hands, as compared with others more abundant in grass on the eastern side of the great range, would it not be advisable for the colonists to cultivate this salt-supplying bush, and thereby to produce a vegetable substitute for the rock salt, which is not only expensive, but only a very imperfect remedy for the clay-licking propensities of sheep and cattle on many runs? Thermometer at sunrise, 70 deg.; at noon, 94 deg.; at 4 P.M., 98 deg.; at 9, 86 deg.;--with wet bulb, 75 deg..