“A very valuable series of books which combine in a very happy way a popular presentation of scientific truth along with the accuracy of treatment which in such subjects is essential.... In their general appearance, and in the quality of their binding, print, and paper, these volumes are perhaps the most satisfactory of all those which offer to the inquiring layman the hardly earned products of technical and specialist research.”—_Spectator_ “A complete set of these manuals is as essential to the equipment of a good school as is an encyclopaedia.... We can conceive no better series of handy books for ready reference than those represented by the Cambridge Manuals.”—_School World_ Cambridge University Press C. F. Clay, Manager LONDON: Fetter Lane, E.C. EDINBURGH: 100 Princes Street End of the Project Gutenberg EBook of The Flea, by Harold Russell