HOETICULTUEE. 345 



extended to a semicorumercial scale in order to determine the value of the 

 method when applied, to the commonly' grown varieties of Japanese persim- 

 mons. The method used in this work is described in detail and. an account is 

 given of experiments in the application of the method to persimmons in Florida 

 and at Washington, D. C. A laboratory method of drying persimmons which has 

 given an excellent product in apr>earance and flavor is also described. 



All of the varieties processed became nonastringent when kept in carbon 

 dioxid, the time required for processing ranging from IJ to 7 days, depending 

 on the variety. The varieties processed in Florida were subjected to a shipping 

 test. With one exception (the yellow-fleshed Zengi) processing greatly in- 

 jured the naturally excellent shipping qualities of the fruit, but the Tane-nashi 

 variety was less seriously affected than many of the others. 



Contrary to the results noted in the previous experiments, no undesirable 

 effects were produced by high humidity while in process. Processing required 

 a longer time in Washington than in Florida, presumably on account of the 

 lower temperatures. It was found that the softening of the fruit after process- 

 ing can be considerably retarded by keeping at refrigerator or cold storage 

 temperatures. 



The results as a whole indicate that the carbon dioxid ripening piocess can be 

 recommended generally for treating persimmons for local distribution. Proc- 

 essing may also be successfully employed after shipment. 



Covering almond trees for frost protection, A. G. McAdie (Mo. Weather 

 Rov., IfO iJD12), No. 2, pp. 282, 283, figs. 2). — Some exi>eriments in covering 

 almond trees with paper at the university farm, Davis, Cal., during February 

 and IMarch, 1912, are reported and discussed. 



The paper- used was a weatherproof manila and was first put on at 5 p. m. 

 February 19, and removed at 9 a. m. February 21. It was again put on at 



5 p. m. February 25, and removed at 8 a. m. February 26, then again put on at 



6 p. m. on February 26 and left on until 8 a. m. March 1. Temperatures were 

 taken both under the cover and outside. 



A minimum temperature of 19° F. occurred a little after 8 a. m. on February 

 26, whereas under the cover the temperature fell to 24°. In general the tem- 

 perature curves were quite similar, the temperature under the cover being 

 higher in every case. The loss of heat, however, while retarded by the cover, 

 was not sufliciently decreased to warrant extensive use of the method in its 

 present form. Likewise, while there was a difference between the inside and 

 outside rates of warming after sunrise, the rate of warming under the cover 

 was still too rapid. It is suggested that a more effective barrier to insolation 

 can be made by using a double cover with an intervening air space. 



Although the almonds were lost the author infers from the experiment that 

 with proper care and improved methods fruits can be protected from the 

 strains incident to rapid loss of temperature and rapid heating, within moderate 

 limits. 



Cranberiy bog management for Wisconsin, O. G. Malde (Wisconsin Sta. 

 Bui. 219, pp. 3-25, figs. 13). — In a previous bulletin of the station the prin- 

 ciples and methods of establishing cranberry bogs were described (E. S. R., 

 26, p. 841). The present bulletin considers the management of a cranberry bog 

 from the time of planting up to the time of harvesting. The subject matter is 

 discussed under the following general headings: Care of new planting, care of 

 bearing cranberiy vines, destroying the weeds, fertilizers for cranberries, pro-' 

 tecting bogs from frosts, protection from insects, reclaiming old cranberry bogs, 

 and marketing vines for planting. 



Tabular data, based on a circular letter sent out in 1910, showing the aver- 

 age acreage, cost of handling, yield, and profits on Wisconsin cranberry bogs. 



