THE third Year-book of the Horticultural Education Association appears under the new title “Scientific Horticulture”. It is longer than in previous years, its contents cover a wider field, and go far to justify the change of heading. The presidential address of the Association is by Dr. T. Wallace, and deals with “Science and Fruit-growing”, mainly from a historical point of view. Many of the papers in the volume were delivered at a revision course in horticulture arranged by the University of Reading in September, 1934. The practical nature of the lectures of this course is at once apparent they deal with the highest-grade modern processes in vegetable culture, glasshouse work and bulb-growing, together with descriptions of diseases and pests. They are incorporated as Bulletin 47 of the University of Reading. Articles contributed specially for the year-book include “Commercial Horticulture in Northern Ireland“by W. J. Megaw and E. E. Skillman, “Fruit-tree Spraying Equipment“by J. Turnbull, “The R.H.S. Apple and Pear Conference, 1934“by N. B. Bagenal and R. T. Pearl, “Selection of Soils for Dessert Apple Growing“by B. S. Furneaux, “Twenty-one Years' Fruit Research at East Mailing“by R. T. Pearl and R. Hart”, “Waste Products in Horticulture, their Utilisation as Humus“by Sir Alfred Howard, and “Research at Rothamsted of Importance in Horticulture“by Miss M. D. Glynne and H. V. Garner. The volume entirely justifies its name, and is a great credit to Mr. R. T. Pearl, its honorary editor. One has the feeling, however, that the bias is on the practical side, and that the newer scientific principles which most gardeners have yet to learn such as photoperiod, seed stratification and control, plant sterility and the conditions affecting vegetative regeneration are not expounded. The school garden, the primary stage in horticultural education, receives no notice whatever.