156 



SUBJECT IXDEX 



Lavandula, 29 



LeMstes, 105, 106, 109, 110, 117 



Leptoplana, 118, 119 



Leuciscns, 101, 102, 103, 104. 117 



Leuconosioc, 65, 66 



Limnaea, 79, 80 



Limnodrilvfi, 118, 119, 120 



Lindera. 30 



Linens, 118 



Hthospermnm, 29 



Lupinus, 22, 23 



Massoia, 30 



Mechanism, of Langenbeck and 

 Triem, 46, 54, 56 



of Krebs, 48, 54, 55, 56 



of Kuhn, 54 

 Mentha, 30 

 Monodora, 30 

 Mucor, 71 

 Myristica, 30 

 Myrrha. 30 

 Myrtus, 30 



2^ais, 118, 119, 120 



Natural isomers, 28 



Nervous system, evolution of, 116 



Nicotiana, 25 



Optical activity, and dissymmetry, 

 12 



heredity and environment, 59 



stability of, 42 



Optical inversion, 15, 59, 61 



of genes, 81 



of the Walden type 73, 74 



Optical isomers, and intermediate 

 pathways, 70 



differential action of, 99, 120 



mechanisms controlling produc- 

 tion, 67 



mechanism of action, 100 



production by catalysts, 68, 69 



production by esterases, 68 



velocity of formation, 45 



Optical purity, advantages of, 51 

 and 'fixed internal milieu," 45 

 maintenance of, 43, 45 



Organic acids, dual action of, 112 



Palaemon, 117 



Paramecium, 107, 108, 118, 124, 125, 

 128 



"Pathways", and optical isomers, 

 71 



Pelargonium, 25 



Perinereis, 118, 119 



Petroleum, origin and asymmerty, 

 31 



Peumus, 30 



Phaenocora, 118 



Phycomyces, 94 



Physiological mutations, 62, 72 



Picea, 30 



Pitivs, 26, 29, 30 



Piper, 30 



Pittosporum, 30 



Platyjioeciliis, 106, 109, 110, 111 



Polycelis, 118 



Porphyra, 23 



Primary constituents of proto- 

 plasm, asymmetry of, 21 

 exclusiveness of the asymmetry 

 sign, 27 



impossibility of inverting, 59 



replaceability of, 28 

 Principle, Curie's, 36, 43, 54 



of fixed pathway, 74, 75 

 Pristina, 118, 119 

 Procerodes, 118, 119 

 Priimis, 26, 44 

 Pyrethrum, 29 



Quartz, optical activity, 12, 13 



Racemates, splitting up of, 41 

 Racemiase, 65, 66 

 Racemic mixture, definition, 10 

 Racemization, and ageing, 47 



and culture medium, 64 



and temperature, 66 

 Rana, 103, 110, 117 

 Relative configuration, 15, 30, 72 

 Rheum, 25 

 Rotifer, 118 

 Rubus, 25 

 Saccharomyces, 71 

 Saccocirrus, 118, 119 

 Sagitta, 118, 119 



