FOR thirty-eight years, the John Innes Horticultural Institution has been carrying out detailed investigations in plant culture, genetics, breeding and other matters. ‘J.I.' composts are now widely used and have perhaps done more than anything else to make the name of the Institution familiar to gardeners. The annual report for 1947, recently issued, gives the results of many continued researches. M. B. Crane has obtained a certain amount of resistance to pear scab, Venturia pirina, from crosses between the pear varieties Giffard and Conference. Rogues in tomatoes are shown by D. Lewis to appear most frequently when the plants are grown at high temperatures (26° C). The same author has analysed seven X-ray induced mutations of the incompatibility gene of Œnothera. They do not confer complete self-compatibility ; but the work is being continued. K. Mather has investigated the three types of gene which affect heterostyly in Primula sinensis. The difference of morphology and physiology between pin-eyed and thrum-eyed flowers is determined by the major genotype, and finally adjusted by the polygenotype. Miss A. Vines has studied breeding system and genetic isolation in Antirrhinum, and A. J. Bateman has estimated the effect of various isolation systems on contamination in seed production.