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The following work has been prepared with a View to such an experiment. It is\written expressly for the use of boys, and it has been the aim and effort of the writer to bring down the subject completely to a level with their ca pacity to understand it. Whether he has suc ceeded the trial must show. He has purpose ly avoided all abstruse questions, and has con fined himself to a simple, common-sense ex planation of each article. Itis very possible some inaccuracies may be discovered and should this be the case, they shall be carefully corrected, should the work be so far approved as to reach another edition.
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