PREFACE.
Every day adds to the popularity of the Aquarium, but every day does not add to the accuracy of the published descriptions of it, or the perspicuity of the directions everywhere given for its formation and maintenance. Lately the periodical press has teemed with essays on the subject; but it does not require a very close scrutiny for the practical man to discern that a majority of such papers express the enthusiasm rather than the knowledge of their authors—a few weeks’ management of a tank seeming to be considered a sufficient qualification for the expounding of its philosophy, though it demands an acquaintance with the minutest details of the most refined departments of botany and zoology to do anything like justice to it.
I have done my best to explain and illustrate the whole rationale of marine and fresh-water tanks in my lately published work. Rustic Adornments for Homes of Taste; but since that work, owing to the expense incurred in its
