Aquatic Microscopy for Beginners, or Common Objects From the Ponds and Ditches

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. In the course of the preparation of the book, its famous author tells us that he had ever in mind his pupils at the Uni versity of Pennsylvania, and of Swarthmore College, especially the boys and girls of the College. I shall be glad, he says, if it serve as an additional aid to their studies.