The origin and scope of the present book will be found fully indicated in the Introduction, so that it is not needful to refer to them here. One change in the original scheme of the work has been made during its passage through the press, viz. the inclusion of an additional chapter from the pen of Prof. F. O. Bower dealing with the life of the late Sir Joseph Hooker. Our veteran botanist passed away on Dec. 10, 1911, in his 95th year, and in him botany loses its outstanding personality as well as its principal link with the past. The history of botany in this country during the Victorian period, when it comes to be written, must of necessity be woven around the life of this great man.

For the excellent index to the book the reader is indebted to Dr E. de Fraine, whose care and good judgment in this matter will be fully appreciated.

F. W. O.

October, 1912