742 EXPERIMENT STATION RECORD. [Vol. 41 



Manuring experiments in tea garden, IV, C. Bernabd and J. J. B. Deuss 

 (Dept. Landb., Nijv. en Handel [Dutch East Indies], Meded. Proefsta. Thee, 

 No. 62 (1919), pp. 29, pis. 2, figs. 8). — Manuring experiments conducted in a 

 number of tea gardens in Batavia during the years 1916-17 are reported. 



The walnut tree, its propagation and care, P. Schonbeeg {Der Walnutz- 

 baum, Seine Anzucht iind Pflege. Stuttgart: Eugen Ulmer, 1917, pp. y//+77, 

 figs. 35). — A short treatise on the culture of the Persian walnut (Juglans 

 regia), including a description of the more important varieties. 



The National rose test-garden in 1918, F. L. Mitlford {Aiiier. Rose Ann. 

 1919, pp. 116-122). — This report covers the two principal groups of cut-flower 

 roses, the Hybrid Perpetuals and the Teas and their hybrids, for the seasons 

 1917 and 1918 as far as the different varieties were available for observation 

 during this period. The data given show the year when received, general 

 average height of the plant, growth habit, growth of the foliage, time of first 

 bloom, and average number of blossoms per plant each month during the 

 growing period. 



Frank N. Meyer's rose contributions, P. Bisset (Amer. Rose Ann. 1919, pp. 

 S8-J{1, pis. 2). — A brief account of the various rose species collected by F. N. 

 Meyer during his Chinese exploratibns. Reference is also made to a number of 

 other ornamentals, as well as fruits and nuts, collected by Meyer. 



Rose-breeding notes for 1918, W. Van Fleet (Amer. Rose Ann. 1919, pp. 

 29-3 Jf). — A progress report on breeding investigations conducted by the author 

 during 1918 at the Bell Experiment Plat, Glenn Dale, Md. The breeding work 

 is being conducted primarily for the production of hai'dy garden varieties. 



Fragrant roses, W. Van Fleet (Amer. Rose Ann. 1919, pp. 14-20). — A gen- 

 eral discussion of various types of fragrant roses and various forms of rose 

 fragrance and the production of attar of roses. A list is given of species and 

 varieties that have proved themselves satisfactory to the author from the 

 standpoint of fragrance. 



Monograph on the doubling phenomenon in tulip flowers, K. Ortlepp 

 (Monographie der Fullungserscheinungen bei Tulpenbliiten. Leipzig: Theod. 

 Ostvald Weigel, 1915, pp. VI+267, pis. 3, figs. 8). — In this monograph the author 

 presents an detail the results of long-continued studies relative to the method 

 and nature of doubling in tulip blooms. In part 1 is described various forms 

 of doubling and the method of doubling in different kinds of tulips. Part 2 

 describes the cultural experiments conducted and the influence of various cul- 

 tural methods upon doubling. Appended to the monograph are notes on the 

 culture of tulips in beds and the forcing of tulips in pots and under glass. 



Briefly summarized, the author's investigation shows that the intensity and 

 method of doubling in tulips is quite variable. The flowers of daughter bulbs 

 are only occasionally double like those of the mother bulbs, and the flowers 

 of the sister bulbs rarely ever show similar doubling. 



All floral parts are, in their development and number, undergoing a continu- 

 ous change from generation to generation. Cultural experiments conducted for 

 a number of years show that rich manuring causes an increase, and moderate 

 and no manuring a decrease in doubling. Doubling was specially stimulated by 

 manures having a high nitrogen content. 



Tulips and their ways, W. R. Dykes {Gard. Chron., 3. ser., 66 (1919), Nos. 

 1703, pp. 89, 90, figs. J,; 1705, pp. 113, lU,, figs. J,).—X discussion of the growth 

 behavior of the wild species of tulips. 



Small atlas of wild, useful plants, W. Obermeyek (Schreihers Kleiner Atlas 

 der Wild-Nvtzpflanzen. Munich: J. F. Srhreiher [1918], pp. 36, pis. 12, fig. 1). — 

 The atlas contains colored illustrations of wild vegetables, berries, fruits, and 



