186 



INDEX 



Oxidations, vital, 98-107, 109-13, 154 



Pahala blight, 62 



Pea, garden, aluminium as micro- 

 nutrient for, 5 



garden, chlorine as micro -nutrient 

 for, 4 



garden, necessity of zinc for, 11 

 Peach, copper deficiency in, 92 



zinc deficiency in, 69, 70-1, 74 

 Pear, boron deficiency in, 89 



copper deficiency in, 90, 92, 94 



effect of zinc deficiency on, 74 



intervenal injection of, 54 



leaves, copper content of, 92 

 Pecan, zinc content of, 73 



rosette, 71-4 

 Pectin, relation of boron to, 121 

 Penicillium Javanicum, effect of trace 



elements on growth of, 7, 20 

 Penquite, R., 144 

 Perla, D., 143 

 Porosis, 127, 143-5 

 Peterman, F. I., 49 

 Pethybridge, G. H., 65 

 Pettinger, N. A., 61-2 

 Pfeffer, W., 1, 2 

 Phalaris tuberosa, copper deficiency in, 



96 

 Phleum pratense, see Timothy 

 Photosynthesis and trace elements, 101 

 Phymatotrichum omnivorum, micro - 



nutrients for, 8 

 Pigs, selenium poisoning of, 127-9 

 Pineapple, chlorosis induced in, by 



manganese, 103 

 Pining, 145-50 

 Pinus radiata rosette, 78-9 

 Piper, C. S., 40, 43-4, 51, 59, 66-7, 94-6 

 Pisces, elements present in, 124-5 

 Pisum sativum, see Pea, garden 

 Pittman, H. A., 91-3 

 Pleurobranchus plumula, cobalt and 



vanadium present in, 125 

 Plum, copper deficiency in, 90-4 



chlorosis of, 55-6 



effect of zinc deficiency on, 74 



intervenal injection of, 54 



leaves, copper content of, 93 

 Poisoning by selenium, 127-31 



by molybdenum, 127 

 Polarograph, 27 



Polarographic determination of alu- 

 minium, 49 



Polarographic determination of cobalt, 

 50 



of copper, 42 



of manganese, 34-5 



of nickel, 50-1 



of zinc, 38-40 

 Pollen, effect of boron on germination 



of, 113-14 

 Polychaeta, elements present in, 124-5 

 Polyphenol oxidase, see Catechol oxidase 

 Potassium, effect of, on absorption of 

 boron, 119-20 



effect of manganese on absorption 

 of, 107-9 

 Potato, catechol oxidase of, 112 

 Poultry, manganese essential for, 127 



selenium poisoning of, 127-8 

 Poverty pit, 89 

 Pugliese, A., 103 



Purification of nutrient media, 22-6 

 Purvis, E. R., 87 



Quale, H. J., 91-2, 94 



Raan, 85-6 



Rabbits, selenium poisoning of, 128-9 



Radish, boron deficiency in, 82 



Ramage, H., 29, 124-5, 147 



Rand, F. V., 72 



Rats, selenium poisoning of, 128-9 



Raulin, J., 7 



Reclamation disease, 6, 94—6, 136-7 



Red beet, manganese deficiency in, 63-4 



Reductions, vital, 98-107, 109-13, 154 



Reed, H. S., 69-71, 90, 101, 109-12 



Reed, J. F., 32, 38-9, 42 



Reeve, E., 119-20 



Rehm, S., 114-15 



Respiration and manganese, 102 



Reuther, W., 67-8, 78 



Rhizopus nigricans, micro-nutrients for, 



8 

 Rice, silicon necessary for, 5 

 Rigg, T., 138 

 Ritchie, W. S., 40 

 Roach, W. A., 52-5, 152 

 Roberg, M., 7, 8, 23 

 Robertson, I. M., 48 

 Robinson, W. O., 128 

 Rogers, C. H., 8 

 Rogers, L. H. 37-8, 42, 139 

 Rosdahl, K. G., 43 

 Rosette of apple tree, 89 

 of pecan, 71-4 



