"I have fully tested the qualifications of _Aureolin_ for the Landscape Painter, and, without hesitation, pronounce it to be the most valuable addition to the 'colour box' since the introduction of Rose Madder. It has supplied a deficiency of a very important character. Hitherto, no Primitive Yellow has been quite satisfactory as to its persistence; so that the Aureolin will not only be regarded by the _artist_ as a great boon in the production of his works, but it must also be considered as a _real_ and _lasting benefit_ to pictorial art in general. The permanence and unaltered purity of its lightest and faintest tints we are assured may be confidently relied upon, inasmuch as they have been fully established by the most severe tests to which colour can be subjected, by several of our ablest and most talented chemists. It is, therefore, needless to enlarge upon its merits, other than that I, for one, feel grateful for its introduction. Its uses are manifold, and may be considered available for every purpose requiring a Yellow of its character. As to Gray--perhaps it is not possible to obtain more delicately pure and transparent aërial tints than are to be produced from a combination of Cobalt, Rose Madder and Aureolin; all of which are of a light description and well suited for the representation of soft and thin effects of the atmosphere. These colours are each of them beautiful, and yield a most exquisite range of tones, which, as they mix together most kindly, render them desirable where purity and delicacy are sought. As to Foliage.--In speaking of Aureolin as adapted for the colouring of foliage and herbage, it is impossible to say too much in its praise. It imparts the vividness and freshness of nature to every colour with which it is combined--a quality of the highest order. As a colour for drapery it has no equal, and may be employed with perfect success, either by itself or with any of the other pigments. "The following table of compound tints will be found extremely useful:-- Aureolin. | Aureolin. | Aureolin. | Aureolin. Burnt Sienna. | Vandyke Brown. | Sepia. | Sepia, or Rose Indigo, or | Indigo, or French | | Madder. French Blue.| Blue. | | Cobalt. Aureolin. | Aureolin. | Aureolin. | Aureolin. Indigo. | Oxide of Chromium.| Emerald | Light Red. | | Green. | Cobalt, or | | | Indigo. Aureolin. | Aureolin. | Aureolin. | Aureolin. Burnt Sienna. | Burnt Umber. | Brown Madder.| Rose Madder.