"On scientific subjects we must have the latest word from the expert, and these Cambridge Manuals are easily the best primers on the market. They are for the mature reader who wishes to find in as short a compass as possible a semi-popular and broad treatment of recent discoveries and modern tendencies. An excellent prospectus has been issued, in which is given a wonderful list of subjects and authors Every conceivable aspect of modern knowledge is represented in the scope of the series, which is truly one of the most important publishing enterprises of recent years." _Glasgow News_ "No such masterpieces of concentrated excellence as these Cambridge Manuals have been published since the Literature and Science Primers of about thirty years ago, in which the leading men of that day made complete expositions in miniature of their respective subjects The increase of specialisation which is steadily going on enormously enhances the value of manuals such as these, in which an expert who has every detail of a particular subject at his finger ends makes a pithy and luminous summary of it for the enlightenment of the general reader, and enables him to grasp easily the fruit of the work of many minds." _Nottingham Guardian_ "Among the excellent series of cheap monographs which are being issued at the present time to lovers of solid reading, none is more scholarly in workmanship or more attractive in form than this published by the Cambridge University Press Each volume is the work of an author who is a master of the subject with which he deals." _Western Daily Press_ Cambridge University Press London: Fetter Lane, E.C. C. F. Clay, Manager * * * * * Transcriber Note Illustrations were repositioned to avoid splitting paragraphs. The errata note was applied to the text. End of the Project Gutenberg EBook of Links With the Past in the Plant World, by Albert Charles Seward