"The fire of the artist's own genius operating upon these materials which have been thus diligently collected, will enable him to make new combinations, perhaps, superior to what had ever before been in the possession of the Art. / / As in the mixture of the variety of metals, which are said to have been melted and run together at the burning of Corinth, a new and till then unknown metal was produced equal in value to any of those that had contributed to its composition."
A Discourse, Delivered to the Students of the Royal Academy [Discourses on Art]
From 1769 to 1772 Reynolds' lectures were delivered annually, with each discourse published shortly after its delivery. After 1772, the lectures were delivered biennially. The first seven discourses were collected and published together in 1778. In 1797, the first collected edition of all fifteen appeared, with a second edition issued in 1798. See the <a href="http://www.oxforddnb.com/view/article/23429?docPos=1">ODNB</a>.<br>
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Text from <u>A Discourse Delivered to the Students of the Royal Academy, on the Distribution of the Prizes, Dec. the 10th, 1774. By the President.</u> (London: Printed for Thomas Davies, 1775). &lt;<a href="http://find.galegroup.com/ecco/infomark.do?&source=gale&prodId=ECCO&userGroupName=viva_uva&tabID=T001&docId=CW106272323&type=multipage&contentSet=ECCOArticles&version=1.0&docLevel=FASCIMILE">Link to ECCO</a>&gt;<br>
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See also Sir Joshua Reynolds, <u>Seven Discourses Delivered in the Royal Academy by the President</u> (London: T. Cadell, 1778). &lt;<a href="http://books.google.com/books?id=FS4GAAAAQAAJ">Link to Google Books</a>&gt;<br>
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Also reading at <a href="http://www.gutenberg.org/files/2176/2176-h/2176-h.htm">PGDP</a>.