INDEX 



(Chief references are in heavy type.) 



ABORTION, prevention of, 239 

 Acetylene, 105, 225 



gas residues, 56 

 Acid egg, 84, 140 



resisting bricks, 139, 141 



resisting cements, 139 



resisting wood, 141 



soils, 209 



used in making sulphate of 



ammonia, 88 

 Addyman, 257 

 Advantages of science, 232 

 African nitrates, 22 



phosphates, 29, 38 



potash, 41 



Agricultural lime, 44 

 Aikman, 257 

 Air and soil, 7 



benefits of, 1 

 Aita, 159, 178 

 Alabama phosphates, 28 

 Algerian phosphates, 29, 38 

 Alkali industry, 172 



soils, 46 



sprays, 245 

 Allen, 255, 257 

 Allmand, 117 

 Allotments, 205, 215 

 Alsace-Lorraine potash, 41 

 Alsatian potash, 40, 46 

 Alternate use of basic slag and 



superphosphate, 209 

 Alum, 164 

 Alumina and nitrogen fixation, 226 



in rock phosphate, 30 



in superphosphate, 139, 148 

 Aluminium used in nitrate works, 

 100 



nitride, 226 

 American fish manure, 114 



phosphates, 28, 32 



potash, 41, 171 

 Amino acids, 4. 176 



Ammonia, 48, 83, 176, J89, 191, 225 



by-product, 48, 83, 226 



coolers, use of, 77 



copper sprays, 242 



decomposition by hesit, 51 



formation, 49, 107, 225 



from bituminous slack, 53 



from coal, 48 



in coal products, distribution of, 

 52 



liquor, 49, 83 



retorts for synthetic, 91 



still, 84 



towers, 49 



unit price, 195 

 Ammoniated superphosphate, 179, 



185, 218 

 Ammonium chloride in gas liquor, 85 



hydrogen carbonate, 72, 85 



hydrogen sulphide, 85 



magnesium phosphate, 72 



nitrate, 92, 101, 104, 191, 224, 226 



oxalate, 72 



phosphate. 72 



polysulphide, 248 



sulphate, 50, 83, 178, 226 



sulphocyanide in gas liquor, 85 

 Amounts of acid needed by phos- 

 phate, 139 



Anaconda copper mining, 231 

 Anderson, 35, 228 

 Andes nitrates, 23 

 Animal excreta, 1 

 Apatite, 28, 30, 119, 147, 148, 173 

 Aphis, sprays for, 251 

 Aqueous solution, principles of, 161 

 Arc process for fixing nitrogen, 79, 



98 

 Areas of land under various crops, 



130 



Argenine, 176 

 Argon and plants, 2 

 Arnoldi, 87, 103 



