34 Report of Schimmel $ Co. April/October 1917. 



according to Mazzaron, of 64 kg. nitrogen, 40 kg. phosphoric acid, and 137 kg. potash; 

 according to other investigators, of 140 kg. nitrogen, 40 kg. phosphoric acid, and 120 kg. 

 potash. The gives a mean of 84 kg. nitrogen, 37 kg. phosphoric acid, and 139 kg. potash. 



Rolet recommands as artificial fertilizers Chili saltpetre, ammonium sulphate, 

 superphosphate, basic slag powder, potassium chloride and potassium sulphate. 



Superphosphate and potash are laid out on the fields together with stable manure. 

 Ammonium sulphate is added before planting, and Chili saltpetre partly before planting, 

 partly during the growth of the plants. 



Superphosphate is suitable for soils rich in lime, basic slag powder for those 

 deficient in that substance; the question, in what manner phosphoric acid is to be 

 employed, has not been decided yet. 



Potassium chloride is only to be recommended for calcareous soils and must be 

 spread out in autumn or winter; potassium sulphate can be employed everywhere. 



In the South, each hectare of siliciferous clay soil is fertilized with 20000 kg. of 

 stable manure or 1500 kg. of sesame cake, besides 300 kg. of Chili saltpetre or 225 kg. 

 of ammonium sulphate, 400 kg. of superphosphate, and 300 kg. of potassium sulphate 

 (500 kg. if sesame cake is used instead of stable manure). The Chili saltpetre is added 

 in 2 portions, once during the cultivation of the fields (200 kg.) and again in the middle 

 of May; ammonium sulphate is only employed in planting. Loamy calcareous, pervious 

 soil on sloping banks demands 300 kg. of Chili saltpetre, 1000 kg. of superphosphate 

 and 300 kg. of potash, which corresponds to an expense of 260 fr.; the yield amounts 

 in this case according to Autran to 20500 kg. of peppermint herb, which are estimated 

 at 12 fr. per 100 kg. 



Other instructions recommend 30000 kg. of stable manure or 2500 kg. of sesame 

 cake, 300kg. of Chili saltpetre, 400kg. of 16 to 18 percent, superphosphate, 100kg. 

 of potassium sulphate, all the above ingredients to be added before planting, with the 

 exception of the Chili saltpetre, which latter must be ploughed into the soil in April. 



A rich soil with average lime content demands 300 kg. of sesame cake (containing 

 5 to 6 per cent, nitrogen and 4 per cent, phosphoric acid), and J20 kg. of potassium 

 chloride (costs, 350 fr.). 



A soil, free from lime, requires 1250 kg. of powdered dry blood (containing 12 to 

 13 percent, nitrogen), 250kg. of slag meal (15 percent.) and 130kg. of potassium 

 sulphate (46 per cent.). The expense amounts to 300 to 350 fr. Otherwise, one can 

 also employ, 18000 kg. of stable manure, or 950 kg. of sesame cake (7 per cent, 

 nitrogen), or 400 kg. of Chili saltpetre; 300 kg. of superphosphate or of basic slag 

 (16 to 18 percent.), and 250kg. of potassium sulphate. Another prescription runs as 

 follows: stable manure, 400 kg. of superphosphate, 300kg. of potash, 300 kg. of gypsum: 

 in April, additional 300 kg. of Chili saltpetre and 300 kg. of gypsum. Or, stable manure, 

 300 kg. of superphosphate, 100 kg. of potassium chloride and 200 kg. of Chili saltpetre, 

 the latter in the spring. 



In testing the peppermint spirit frequently used in North America it is not sufficient 

 to determine its content of peppermint oil, on the contrary, one must also try to 

 ascertain the quaHty of the oil, because sometimes oils are employed for manufacturing 

 the spirit which have been freed from menthol or even adulterated. Following the 

 directions of the American Pharmacopoeia spirit of peppermint should be produced 

 by treating peppermint leaves with alcohol which have been previously soaked in 

 water. According to H. L. Thompson 1 ), the test for examining peppermint spirit on 



x ) Americ. Journ. Pharm..SS (1916), 303. 



