SKATE, MAIDS, and THORNBACKS are all of one species; they ought to be white and thick. The two latter should be kept a day, or perhaps two, to make them tender, and Skate may be kept longer. The maiden Skate and the young male, or Thornback, are the best; but large, old Skate, is generally coarse and rank. FLOUNDERS, PLAICE, &c. should be stiff and firm, with bright, full eyes. If flabby, these and all other kinds of fish are certainly stale. The Thames Flounders are reckoned best, in London, because they may be had alive, or nearly so, and they are always best when dressed as soon as caught. HERRINGS, PILCHARDS, WHITINGS, SPRATS, &c.—These may be classed together. The largest are the best. Their gills should be of a fine red, their fins stiff, their eyes bright, and their flesh, when best, is bright and firm. As the Herrings emigrate, in immense shoals, from the northern regions, they are in the greatest perfection on their first arrival on the coasts of Scotland, the North of Ireland, and the Isle of Man. On the coast of the German Ocean also, even so far south as Yarmouth, they are taken in great quantities, remarkably fat and fine, and full of spawn; but before they reach the southern coast of England, they become poor and thin, and are then known by the denomination of Shotten-Herrings. MACKEREL look beautifully bright when first caught. These and WHITINGS should be dressed as soon as possible. FRESH WATER FISH. PIKE and JACK are taken in rivers; they are very dry eating, and require much seasoning and sauce. CARP, TENCH, and PERCH, are best eaten as soon as caught; the latter is not so much esteemed as the two former. SMELTS, when fresh, have a fine bright appearance, firm flesh, and a fragrant smell, like a cucumber. GUDGEONS, ROACH, and DACE, and most other river fish, must be chosen by the rules already given. BUTTER, CHEESE, and EGGS. BUTTER should be chosen by the taste and smell.—The best fresh butter is the Epping, and next the Cambridge; sometimes the potted weekly Dorset is very good. Of tub butter, the Welch is best, the Dutch next, and the Irish worst. In examining tub-butter, and particularly the Irish, look at and smell to the outside next the cask, which is often white in appearance like tallow, and quite rank in smell. CHEESE. Of the common kinds, Cheshire, North Wiltshire and double Gloucester, are the best. Cheese of the first making, in May, is usually brought to Market in August. Factors have a pernicious practice of sticking brass pins into cheese, which gives it the appearance of blue mould and old age. That cheese which has a smooth, moist coat, is generally good. Spanish arnatto is often used to give the rind a beautiful red colour. EGGS.—If fresh, will feel warm when the tongue is applied to the biggest end; but if stale, it will be cold. An egg, when quite fresh, will sink at once when put into cold water; but if rotten, it will swim.