INDEX 



829 



Lecithin, oxidised by iron, 589 



Lecithin- vitellin compound, 66 



Leeuwenhoek, portrait of, 666 



Legumiriosic, root txibercles of, 252 



Lehmann's ultra-violet filter, 569 



Length of muscle fibre, energy proportional 



to, 443 



Lens of eye, 516, 517 

 Leonardo, mirror writing of, 667 

 Leonardo's heart experiments, 667 

 Leucine crystals, electric charge of, 104 

 Liebreich's dead space, 54 

 Life and energy, 31 



definition of, xi 

 Light, absorption of, 548 



effect of, on growth, 572 



effect of, on permeability, 572 



energy, 548 



production of, 362, 595 



receptors in plant for, 530 



sensibility of skin to, 516 

 Limiting factors in photosynthesis, 568 

 Linear function, 36 



Lipines, 130 



Lipoid solubility, 130, 131 



and partition coefficient, 134 

 Lipoids, 130 



action of, on heart, 212 



adsorption of dyes by, 132 



in cell membrane, 129, 130 



in coagulation of blood, 703 



in colloidal solution in chloroform, 131 



removed from heart by perfusion, 211 

 Liquid spheres, Darling's method of, 48 

 Liver, capillaries of, 164 



cells, respiration of particles from, 593 



forms urea from ammonia, 265 



metabolism in, during digestion, 612 

 Living nerve cells, structure of, 470 

 Local excitatory change in nerve, 385, 397 



warming of heart, 653, 655 

 Lock and key simile, 726, 728 

 Locke's Ringer solution, 21 1 

 Locomotion, movements of, 491 

 Logarithm, differential coefficient of, 35 



invention of, 40 

 Loven reflexes, 698 



Lower organisms, physiology of, viii, 291 

 Luciferin, 362 

 Ludwig, portrait of, 685 

 Luminous organisms, 362 

 Lung, circulation in, related to osmotic 

 pressure of blood, 164 



tissue, reducing power of, 595 

 Lungs, 625 



oxygen consumption of, 612 



vasomotor supply of, 690 

 Lutein, 561, 562 



Lymph production, 165, 352 

 Lyophile and lyophobe colloids, 78 

 Lyotropic action, 97, 183 



M 



Macdonald's theory of inhibition, 426 

 Magnesium, anaesthetic action of, 217 



antagonised by calcium, 217 



in physiological saline, 209, 211 



relation of, to heart muscle, 454 

 Maintenance, 269 



accessory factors for, 255 



lysine not needed for, 256, 257 



of contraction, efficiency of, 450 

 Malapterurus, electrical neurone of, 471 

 Male power, worship of, 291 

 Malignant growths, 25 



Mammary gland and corpus luteum, 718 



excited by pituitary, 719 



Manganese, action of minute quantities of, 

 221 



as oxidising enzyme, 66 



as peroxidase, 585 



eflect of, on formation of conidia, 222 

 Mannitol in respiration of fungi, 611 

 Marine organisms, osmotic pressure of blood 



of, 165 



' ' Masked " iron, 69 

 Mass action and reactions at surfaces, 59, 68 



history of, 322 



in heterogeneous systems, 623 



in nitrogen metabolism, 290 



law of, 184 



Mathematical laws of growth, 290 

 Mathematics as a mill (Huxley), 37 



in physiology, 37 



Maximal work in relation to equilibrium, 30 



of chemical process, 30 



Maximum energy of solar spectrum, 562 



Maxwell's law, 180 



Mayow, portrait of, 601 



Mean free path, 85 



Measurement of electrical conductivity, 175 



of hydrogen ion concentration, 187 

 Mechanical stimulation of nerve, 383 

 Mechanism of precipitation of colloids, 93 



of tonic contraction, 539 

 Medium of dispersion, 75 



Medullary sheath, double refraction of, 396 



function of, 259, 395 



Membrane potential as model of metallic 

 electrode, 648 



formula for, 647 



indifferent to nature of ion, 660 



Membranes as sieves, 112, 113 



properties of, 111 



similar to cell membrane, 115 

 Memory, 481 



in insects and earthworm, 482 

 Mendelian segregation, diagram of, 294 

 Mendelism, 292 



Merchiston Tower, view of, 40 

 Metabolism, definition of, 263 



in absence of oxygen, a special one, 611 



