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Note.—There are only two points requiring mention respecting the following replies. First, that in order to avoid useless repetition of the questions, the answers are numbered, and the corresponding question will be found in the following circular. Secondly, that the replies are verbatim, as received from the manufacturers, except that frequent entries will be found in square brackets, e.g. [A 0·11 in.] These represent approximately the sectional area of the conductors, and are given to facilitate the comparison of the conducting capacities of the very various patterns submitted to the Conference.