IN a work which has more than one author, it is right to distinguish as far as possible what has been con tributed by each. The first part of this book, then, has been mainly composed by the present writer (who has acted as' editor), and the second by Mr. Garnett; but it is due to Mr. Garnett to add that, while he had the chief share of the labour of collecting materials for the whole biography, and the entire burden of the account here given of Maxwell's contributions to science, the substance of Chapters XI. XII. XIII. Is also largely drawn from information obtained through him. The matter of whole pages remains almost in his very words, although for the sake of uniformity and simplicity the first person has still been used in speaking of my own reminiscences.
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