HORTICULTURE. 297 



Ijotassiuin oxid 120 lbs. On each of these plats were grown beets, 

 cabbage, celery, lettuce, spinach, tomatoes, and potatoes, the position 

 of each vegetable in the plats being changed from year to year to 

 introduce so far as practicable a system of rotation of crops, but the 

 order of arrangement was the same on all the plats. 



Tables are given showing the results for the several plats in the 

 different years. 



In 1893 plat 5, fertilized with 47 lbs. of nitrate of soda, 30 of sulphate 

 of potash, and 40 of dissolved boneblack, gave the greatest yield of 

 spinach, beets, celery, tomatoes, and lettuce. The result was the same 

 in the 2 preceding years, except that then cabbages and potatoes also 

 gave the best results on plat 5. 



Special fertilization with reference to some prominent indus- 

 trial crops, fruits, and vegetables, C. A. Goessmann {Masaachui^etts 

 State Sta. Kpt. 1S93, pp. 211-261). — To continue during the winter the 

 field experiments mentioned above, 12 boxes of earth were placed in 

 the vegetation house of the station and each fertilized with a different 

 combination of the following substances: Muriate of potash, sulphate 

 of potash, carbonate of potash and magnesia, phospliate of potash, 

 dissolved boneblack, odorless phosphate, double superphosphate, nitrate 

 of soda, sulphate of ammonia, phosphate of ammonia, and dried blood. 

 The relative ratio of essential fertilizing constituents applied was 4 

 parts potassium oxid, 1 part phosphoric acid, and 1 part nitrogen. 

 Each box was ])lanted with seeds of lettuce, spinach, beets, and toma- 

 toes. 



From the tables given the lettuce appears to have made the best 

 growth where the fertilizer contained carbonate of potash and mag- 

 nesia, and the poorest where the nitrogen was furnished by ammonia 

 salts. The beets gave much the same results. The spinach apparently 

 showed a more vigorous growth when nitrate of soda was present. The 

 experiment with tomatoes was less conclusive. All of the fertilized 

 plants grew better than check plants grown on soil manured only with 

 vegetable compost. 



For garden vegetables and fruit trees a mixture containing 24 per 

 cent potassium oxid, 12 per cent phospLoric acid, and 12 ]>er cent nitro- 

 gen is suggested. A table is appended showing the relative propor- 

 tions of these constituents in many fruits and garden crops. 



Climate and its effects on the quality of apples, L. H. Pammel 

 {Trans. Iowa Hort. Soe., 27 {lS92)j pp. 132-13S). — A preliminary paper 

 on the subject, giving the origin and cultivated range of the apple, and 

 notes on trhe varieties Oldenburg, Fameuse, Wealthy, and Ben Davis. 

 In spite of the fact that as a rule fruits improve in quality toward the 

 equator, the data so far collected seem to indicate that most varieties 

 of apples reach their perfection in a cooler climate. 



Zinc in American dried apples, F. Filsinger and R. Hefel- 

 MANN {Chem. Zt/j., IS {1S94), iV^o. 05, pp. 1239, 1210; JS'o. 69, pp. 1319^ 

 9467— No. 4 4 



