THIS work is the outcome of a particular course of practical lessons conducted by its author. The disability which such an origin fastens upon a book is well known to every teacher of zoology, and ...

First Amendment: Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof ...

Model vertebrates are extensively studied non-human vertebrates (species with a notochord, or vertebral column) chosen for the ease of investigating particular biological phenomena in areas such ...