HORTICULTURE. 41 



periinents in 100S-!) with the view to (leterniiiiins;, among other things, the 

 l)ossil)ility of substituting heated humid air for the warm water, the intluence 

 of warm baths when applied previous to the autunmal leaf fall, the leaf strip- 

 ping f)f shrubs in its relation to foreing the buds, the specific intluence of the 

 warm bath on various horticulturally important plants, bulbs, tubers, and seed, 

 and the effect of cold and temperature changes on the forcing of buds. The 

 experiments, together with the results, are discussed in detail. 



In general only the Forsythia and the common lilac responded to the warm- 

 water treatment previous to the autumnal leaf fall. Likewise a bath of humid 

 air of the same temperature as the warm water and maintained for the same 

 length of time was found to be generally unsatisfactory as a sultstitute for 

 the warm-water bath. Favorable action was secured with the lilac, however, 

 when it was submitted to a long continued air bath in December, and later 

 on, when the dormant condition was less complete, many other shrubs were 

 stimulated by the warm air bath. The following commercially important 

 plants wei-e readily forced by means of the warm-water bath: l^i/riiii/d nil- 

 (/aii.s, .S'. pcrtsiva, Forsiithia suspensa, Prunus trilobd, t^iiirwu puhnata, *s'. jojxjuica, 

 Azithu moUifi, A. poittku, l^aii.v caprca, and ConvdlUtria iiKijalis. The warm- 

 water Itath also acted favorably in stimulating the growth of certain bulbs such 

 as onions and narcissus and tubers of Sauroniatum and Amorphophallus, as well 

 as in hastening the germination of mistletoe seed which had undergone a portion 

 of the resting period. 



The exposure of dormant buds to frequent variations in temperature acted 

 quite unfavorably on their forcing capacity. 



Lilacs which were stripped in spring and early summer leafed out again 

 abundantly, whereas with those stripped after the middle of July the buds 

 remained dormant, except when treated to the warm bath. 



The author reviews various theories as to the factors responsible for the 

 stimulating effect of the warm bath. The failure of the warm air bath when 

 used as a substitute for the warm water indicates that something other than the 

 high temperature is responsible for the beneficial action, although just what 

 causes this the author is not as yet prepared to say. 



The culture of plants in pots, A. Petit {Principes Griirraux de la Culture 

 (Ic.s Pldiiti.s en Pots. Pdiis, 1910, pp. 169). — The present work is offered as a 

 record of the author's exiierience and observations on the pot culture of plants 

 rather than as a complete treatise on the subject. The following are among the 

 important phases discussed: The intluence of the pots on the development of 

 plants, size and porosity of the receptacles in relation to the growth of the 

 plants, danger of repeated potting, selection of soils, watering, and fertilizers. 



Manual of gardening, L. H. Bailey (Netv York, 1910, pp. XVI +539, pis. 25, 

 fi(/x. .i-')6). — This manual is offered as a practical guide to the making of home 

 grounds and the growing of flowers, fruits, and vegetables for home use. The 

 subject-matter is a combination and revision of many parts of Garden Making 

 (E. S. K., 10, p. 50) and Amateurs I'ractical Garden Book (E. S. K., 12, p. 753), 

 together with considerable new material and the results of 10 years' added 

 experience. 



The vegetable grower's guide, J. Wkight and H. J. Wright {London, 

 [190S?], vols. 1, pp. X+352, pis. 15, figs. 131; 2, pp. 350, pis. 15, figs. 62).— The 

 purpose of this comprehensive treatise is to present the principles of vegetable 

 growing for the benefit of both private and market gardeners. 



(Jeneral consideration is given to the location of the garden, drainage. i)lan- 

 ning, iiaths and edgings, l)uildings and appliances, jireparation of tlie land. 

 manures and manuring, rotations and iuter-croppiug, and enemies in the kit -hen 



