836 EXPERIMENT STATION RECOED. 



27, p. 842), the various temperatures ranging from 25 to 45° C. (77 to 113° F.), 

 and for 5- and 10-hour periods. The warm water bath was applied to some 

 lots of plants as early as November 25 and to others as late as February 22. 



Summing up the data secured from the various tests, the author finds that 

 the advantage of the warm water process for early forcing has been proved 

 beyond doubt. The temperature of the water and the duration of the bath 

 varies with the time the plants are to be forced. For early forcing the tem- 

 perature should range from 35 to 38° and the bath should be continued for a 

 10-hour period, or with a temperature of 40° an inmiersion period of only 4 or 

 5 hours is necessary. Later in the season the temperature may be reduced 

 from 32 to 35° and the immersion period continue<l for about 5 hours. In the 

 present experiments the warm water bath applied after the middle of February 

 appeared to be not only superfluous but to do some damage. 



Generally speaking, it is not necessary to inuuerse the plants for as long a 

 time after a wet or cold summer as after a dry and warm summer. Plants 

 from heavy soils are more susceptible to treatment than plants from light 

 sandy soils, and large plants react more favorably than small plants. In all 

 cases it is necessary to maintain the water at the proper temperature through- 

 out the time of the bath. 



[Phloxes and pyrethrums at Wisley, 1915], C. C. Titch marsh {Jour. Roy. 

 Hort. Soc, 41 (1015), No. 2, pp. 250-2'i6). — This comprises a report on several 

 hundred varieties of phlox and pyrethrums under observation at the Wisley 

 Gardens during 1915. 



House and window plants, D. Bois {Leu Plnntcs d'Apparlemcnt et les 

 Planter dc Fcn^trcs. I'arix: ,/. li. B(ulli('Tr d Sons, 11)16, 2. cd., rev. and cnL, 

 pp. JfJfS, flgH. 219). — Part 1 of this work deals with the general principles of 

 culture as applied to house and win<low plants. Part 2 contains a descriptive 

 list of plants suitable for win<lo\vs and balconies, including .siiecific cultural 

 directions^, and part 3 takes up in a similar manner tlie plants suitable for 

 culture in the hou.se. Part 4 contains cla.ssifieil lists of the plants, with special 

 reference to their light requirements and value for foliage, flowers, and decora- 

 tive purposes. 



Fertilizing lawn and garden soils, P. E. Rrown {Iowa Sta. Cire. 24 {1916). 

 pp. 3-15). — This circular discusses the preparation of lawn soils, fertilization, 

 seeding, subsequent fertilization, and renovating lawn.s. Information is also 

 given relative to (he use of fertilizers and green manure crops for the vegetable 

 garden. 



The North Dakota farmstead, its arrangement and adornment, II. O. 

 Wernkr (Xortfi Dakota <S7«. Circ. JO {1916), pp. 62, figs. 51). — In this circular 

 the author discusses the location of the farmstead site and the arrangement of 

 farm buildings and grounds, together with the development of the farmstead 

 from an ornamental point of view. A descriptive list is given of trees, shrubs, 

 vines, hardy perennials, and annual plants suitetl for North Dakota conditions, 

 together with detail plans of farmsteads with lists of plant materials sug- 

 gested. Directions are also givt>n for the culture and care of trees and shrubs. 



Gardeners' and florists' annual for 1916, tnllted l\v J. H. Dick {Xew York: 

 A. T. Dc La Mare Printing t(- Publi.9hing Co., Ltd., 1916, pp. 2,^1. figs. 2/).— This 

 work contains a digest of the events of the horticultural year in this country 

 and abroad, including the activities of the national societies, a summary of 

 law cases affecting the trade, biographies of leading horticulturists, six^cial 

 articles, and miscellaneous notes and information dealing with gardening and 

 floriculture. 



