Vermilion -This color is but little used, on account of its great specific gravity, and seldom without being combined with some other color. It is a preparation of mercury, and, though nominally a much lower price than lake, it is so heavy that it comes nearly as deal' as that article.

Rose Pink -This is a very useful, though common, color; it is composed of chalk or whiting, colored with Brazil wood, consequently it is what is termed a fugitive color, the pink very quickly fading on exposure to the atmosphere or heat. When combined with indigo or a little Chinese blue, it makes a good purple.

Burnt Ochre -This color is sometimes called stone ochre. It is one of the most useful colors we have, and, as the price is low, it is extensively used. With the addition of a little black it makes a good brown; with a little blue or indigo it makes a good olive; or it is a good color used by itself, and not liable to change.

Wood Lake -This is a preparation of peach wood, and has only been introduced of late years to the notice of marblers. It is manufactured at Birmingham. This color is an exception to the rule, as it is sold in the pulp or damp state, and may be mixed and even used without grinding, being made almost exclusively for marbling. It is the best red we have for general purposes, and for appearance comes next to the drop lake.

Chinese Blue -This is a very beautiful, but not a very durable, color. It is, however, an almost indispensable one to the marbler, as it will produce nearly every shade of blue by the addition of certain proportions of white. This color requires particularly well grinding, as, indeed, do all the blues; it is also sold at some places in the pulp or damp state. There is a very good damp blue made in Birmingham.

Indigo -This is a most valuable color, and cannot be dispensed with under any consideration. It is too well known to require any description here. Though not a bright color, it is one of the most durable, and for mixing and producing greens and purples of a permanent kind is invaluable; neither can you make a good black without its help: but be sure you procure it good.

Ultramarine -This is a very beautiful color, but must be used sparingly, as it will not glaze or take any polish, and is always inclined to rub off. The kinds now in general use are the French and German, the genuine article being far too high in price for this kind of work.

Prussian Blue -This color has of late been almost superseded by the Chinese blue, which is a much brighter color; Prussian blue is darker and much heavier looking, and is, moreover, a very bad color for glazing.

Dutch Pink -This is a common, but very useful, color. It is a preparation of whiting and quercitron bark, and is used in making greens, no other color answering the purpose so well. It is also very useful in mixing with chrome to produce the various shades of yellow you may require.

Chrome -This is of various shades, varying from a light lemon color to a deep orange, approaching to red. It is a useful color; but, unless it is pure, it is very difficult to get it to work properly.

Raw Ochre or Oxford Ochre -This may be used in certain proportions for making olive tints, combined with Dutch pink and blue or black. It is also of use in small quantities to mix with yellows when they are inclined to run off, this color being of a very adhesive nature.

Drop Ivory Black -This color cannot well be used alone; it may, therefore, be called only an auxiliary to others.

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