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PREFACE.
comprehensive and responsible. The manner in which he has endeavoured to accomplish this twofold object has been by eliding infinitesimal, but noting carefully all essential, details. With faith in the maxim that example is better than precept, he has given numerous examples, worked out for the pupil's guidance and imitation. After preparation, the pupil may, in school, be required to reproduce the different Tables without the book. Then he may pass on to the unworked exercises.
W. S. R.
Edinburgh, August 1870.
