The study of the diseases of plants offers a very wide field to the inquirer, and it is only of recent years that investigations in this direction have come to be regarded as of economic importance. In spite of the strong prejudices of agriculturists of the old school, it is believed that vegetable pathology will prove to be of the greatest practical value, and that the time is approaching when the best means of preventing the attacks of disease will be a recognised branch of practical agriculture. This eventuality is certainly indicated by the appearance of _Diseases of Field and Garden Crops, chiefly such as are caused by Fungi_, by Worthington G. Smith (London: Macmillan & Co.). Originally delivered as addresses at the request of the officers of the Institute of Agriculture at the British Museum, South Kensington, these notes are very full and elaborate, while the admirable illustrations with which they are accompanied give them an additional value. Although necessarily technical, the definition of all the phenomena of the diseases has been given in familiar words, and all botanical terms have been explained. To illustrate the thoroughness with which the work has been done, having regard to the limits of the volume, we find under ‘Potatoes’ the new disease (_Peziza postuma_) which has made its appearance within the last few years, the dreaded disease produced by the parasitic fungus of the murrain, the smut, scab, and the old potato disease in its active and passive state. Then mildew and blight are treated of as affecting respectively onions, straw, turnips, cabbages, grass, corn, borage, barberries, parsnips, peas, and lettuces. There are also valuable notes upon the new diseases which are making such havoc with grass, wheat, barley, ryegrass, and onions; and their fungoid character is conclusively established. The book, like those on cognate subjects by Miss Ormerod, which have been already noticed in these pages, will amply repay careful study. THE MONTH: SCIENCE AND ARTS. The Society of Arts, London, has just commenced the one hundred and thirty-first session of its useful career. Professor Abel, the chairman of its Council, presided at the opening meeting, and his speech was a resumé of the progress of scientific research in various directions, in which a large number of persons are just now much interested. Being an electrician, he naturally devoted some time to the progress of electrical illumination, and pointed to the wonderful display at the recent International Health Exhibition as an illustration of the grand results now possible. He also expressed himself satisfied with the recent advances made in the direction of electric railways and other means of locomotion to which the comparatively new power has been experimentally applied, not omitting a very favourable reference to the telpherage system of Professor Fleeming Jenkin.