No. 2, June, 1921] HORTICULTURE 169 



1155. Morris, Robert T. Comment. [Rev. of: Knight, F. A. Propagation of the wal- 

 nut. Trans. Hort. See. London 3: 133. 1918.] Amer. Nut Jour. 11: 20-21. 1919.— Critical 

 comments on F. A. Knight's "Propagation of the walnut." — E. L. Overholser. 



1156. MuNsoN, K. W., AND E. W. White. Loganberry culture. British Columbia Dept. 

 Agric Circ. New Hort. Ser. 54. 23 p., 10 fig. 1920. 



1157. MuNSON, K. W., AND E. W. White. Raspberry culture. British Columbia Dept. 

 Agric. Circ. New Hort. Ser. 55. 15 p., 7 fig. 1920. 



1158. Nanot, Jules. Reconstitution des plantations fruitieres dans les regions liberees 

 et evaluation des dommages causees aux arbres. [Restoration of orchards in the liberated 

 regions with an estimate of the damage done to the trees.] 84 p., 50 fig. Miason: Paris, 1920. 



1159. Orb, G. The story of the prune. Sci. Amer. 124: 52. 3 fig. 1921. 



1160. Pray, Luis. Plantemos frutillares industriales. [Commercial strawberry plant- 

 ings.] El. Agricultor [Santiago, Chile] 5: 5-7. 2 fig. 1920. 



1161. Prayag, S. H. The influence of stock and scion and their relation to one another. 

 Agric. Jour. India 15:533-542. 3 fig. 1920. — Some stocks have a distinct preference for 

 particular scions while others do not. The stock plays an important part in influencing the 

 habit of growth and hardiness of the scion. The formation, at the point of union, of big 

 knotty excrescences in plants whose rate of growth is not similar, considerably checks 

 growth. Grafted plants composed of parts having different periods of rest fail to grow into 

 big plants. The scion has a preponderating influence in determining the character of the 

 fruit produced by it. The position of the mature scion at the end of a branch in a large tree 

 influences the flowering. It is undesirable to insert scions of more than one variety on the 

 branches of a single stock. Grafting between different genera, though succeeding in some 

 cases, has not been found successful in the mango. — /. /. Skinner. 



1162. Ringelmann, M. Chauffage des serres au bois. [Heating greenhouses with wood.] 

 Revue Hort. 92: 180-181. Fig. 62-63. 1920.— A method is detailed of making and fitting 

 special grates for the burning of wood in furnaces intended for the use of coal. — E. J. Kraus. 



1163. RivifeRE, Gustave, et Gabriel Bailhache. Observations sur la composition de 

 I'atmosphere d'un fruitier dans lequel on conserve des pommes de Caville Blanc. [Observa- 

 tions on the composition of the atmosphere of a fruit store where apples are kept.] Jour. Soc. 

 Nation. Hort. France 21:151-153, 202-204, 234-235. 1920.— The writers state that after 

 apples are mature, during the period they are kept in the fruit store or storage room, they lose 

 their green color, and, due to chemical reactions in the apple itself, they give off CO2 and 

 take in oxygen whether they be in the light or in partial or total darkness. Due to this giving 

 off of CO2 the atmosphere in the fruit store becomes considerably modified and it is the 

 belief of the writers that this must have some effect on the fruit itself. Analyses were made 

 of the air of a fruit storage room and it was found to contain a large amount of CO2. The 

 writers conclude that CO2 must be an important factor in the keeping of fruits, since in 

 experiments with pears, covering several years small quantities of CO 2 retarded maturity 

 and arrested it completely when in excess. Results are given of temperature and humidity 

 studies in a fruit storage room. When the temperature was the highest, 10°C., the humidity 

 was also the highest, 94 per cent of saturation. At the lowest temperature, 2°C., the hu- 

 midity was 88. It is stated that this high humidity probably accounts for apples keeping 

 for a long time with only a slight withering or wrinkling of the skin. The writers conclude 

 that the temperature ought to be maintained between 2 and 4°C., and add that this can be 

 accomplished only under refrigeration. — H. C. Thompson. 



1164. Robertson, W. H. Currant and gooseberry culture. British Columbia Dept. 

 Agric. Circ. New Hort. Ser. 61. 8 p. 1921. 



