538 EXPERIMENT STATION RECORD, 



Tlioiiiiis slag Jiiiil 40 jier cent pcttasli salt. In two out of throe cases the highest 

 ylehls and greatest prolits were obtained with the liui(> nitrogen. 



Sug'g'estions for defense against spring frosts. L. DixiRtiM.Y iPvofi. Apr. rt 

 \ it. (Ihl. rh'st-Cnilir), ,U (191(1). Xo. I.i. i>ii. I!).J-1<K)).—A popular summary of 

 practices employed in Europe for protecting vineyards against late spring frosts. 



The pruning of apple trees, W. S. Tiiornber ( Wa.sliinyton Sta. Papidar linl. 

 2Ji, pp. Jf). — This ccmtains brief instructions for pruning and training apple 

 trees during t]i(> first 4 or 5 years of their growth, and for the jiruning of bear- 

 ing trees. 



Origin and synonymy of the olive varieties of Istria and Trentino, C. 

 Hfoi'KS {Hoi. Qiiiiiil. .voc. .\;/r. IlaL. lo (I'JIO). Xo. 2. pp. o2-.jD). — In tills paper 

 the author endeavors to work out the history and synonymy of a number of 

 varieties of olives growing in Istria and Trentino. 



Propagation of mangoes, W. E. Hess (Porto Rico I fort. Xrirf<. 3 i lUlO). Xo. 

 2, p. JO). — As a result of experiments conducted during the season of 1909, the 

 author reports success in the production of inarched mango plants of choice 

 varieties ready to plant in the orchard within 8 months from the seed. His 

 method of procedure is described. An important aid to early germination ap- 

 pears to be the removal of the kernels from the husk before planting. Seed- 

 lings thus grown were ready for inarching 45 days after planting. 



The limitation of the Satsunia orange to Trifoliate-orange stock, W. T. 

 Swingle (U. S. Dept. Agr., Bur. riant Iiidii.s. Circ. .'i6, pp. 10, pi. /, figs. 6). — 

 In A iew of the large experimental and prospective commercial plantings of 

 the Satsuma orange in many of the Gulf States, this circular contains a warn- 

 ing to jilanters not to purchase the Satsuma orange budded on sour-orange 

 stock, since the Satsuma succeeds well only when budded on Trifoliate-orange 

 stock. 



A simple method for identifying with certainty Trifoliate stock, which was 

 discovered in 1887 by O. I'enzig, director of the botanic garden at Genoa, Italy, 

 is here described. This consists in an examination of a longitudinal section 

 of the pith of the stock, w^hich, if Trifoliate, will show characteristic thick- 

 walled pitted cells that make up the imperfect cross partitions. There is an 

 absence of these thick-walled cells in the sour orange and other citrus fruits. 

 In case of doubt this Department offers for the present to determine whether 

 or not inirchased stock is the Trifoliate orange. 



Citrus fruits in Texas, H. II. Hume (Tcras Drpt. Agr. Bill. 3, pp. 55. figs. 

 28). — At the request of the Connnissioner of Agriculture of Texas, the author 

 investigated the possibilities of citrus fruit growing in the gulf coast country 

 of that State. The present bulletin comprises a report on this investigation. 



Part 1 contains notes on the history and present condition of a large number 

 of individual citrus trees, growing in different parts of the coast country, as 

 well as on orchard plantings which have been made, soils, climate, and citrus 

 stocks. The author concludes in brief after considering the whole matter 

 in relation to climatic conditions that citrus fruits have been, are being, and 

 will be grown in the gulf coast region of Texas. It is believed that the Satsuma 

 will be the principal orange grown. Part 2 has to do with citrus culture. It 

 discusses setting out the orchard, cultivation, pruning, protection against cold, 

 fertilizers, varieties, and handling the crop. 



Cocoa experiment plats, W. M. Malins-Smith (Proc. Agr. Sac. Trinidad 

 and Tobago. 10 ( I'JIO). Xo. 1, pp. 11-1. 't). — The relative values of a number of 

 complete manures and fertilizer coml»inatious were tested on 1-acre cacao 

 plats which previous to the tests had yielded as high as Tt bags of 180 lbs. 

 each per acre. The experiments tend to show that with judicious manuring 



