Well To All Of These Must Be Superadded Durability When Used A

: ON COLOURS AND PIGMENTS GENERALLY.

quality to which the health and vitality of a picture belong, and one so

essential that all other properties put together without it are of no

esteem with the artist who merits reputation. We have, therefore, given

it a previous distinct consideration.



It must be observed that no pigment possesses all the foregoing

qualifications in perfection, some being naturally at variance or

opposed; nor is there any, perhaps, that cannot boast excellence in one

or more of them.



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