"The discovery that stem cuttings can be induced to root more readily - in many cases spectacularly so - if their foliar part is kept cool by being subjected to a fine spray of water, has virtually revolutionized the art of plant propagation. In 1959 a valuable digest of work done on this subject was issued by the Commonwealth Bureau of Horticultural Plantation Crops (now out of print). Since this time a variety of apparatus has been developed in this country and abroad (especially in America) for producing and controlling the application of the spray... Mr Welch's book deal(s) with the subject ... It is intended both for the commercial user and the beginner... "--Book jacket.