tallic salts, 13, 224, 227, 237, 247.
"Metal proteids," 14.
Meta-pectin, 70.
Metaproteins, 175.
Methylethylmalein imide, 108.
Methyl glucosides, 42.
Methyl pentoses, 35.
Methyl salicylate, 81.
Middle lamella, 67, 70.
Millon's reaction, 173.
Molisch's reaction, 174.
Monoglycerides, 131.
Monohydric alcohols, 135.
Monosaccharides, 31, =35=, 45.
Morin, 119.
Morphine, 155, =158=.
Morphological adaptations, 251, 252, =255=.
Mucilages, 67, =70=.
Muco-celluloses, 74.
Muscarine, =152=.
Mustard oils, 88, 148.
Mustard oil glucosides, 88.
Mutarotation, 46, 49.
Myrosin, 77, 88, 149, 189.
Myrtillidin, 85.
Myrtillin, =85=.

Narceine, 158.
Narcotine, 158.
"Natural selection," 254.
Neurine, 152.
Nicotine, 155, =156=.
Nitrates, 6.
Nitrile reaction, =43=.
Nitriles, 43, 44.
Nitrogen, 3, 5, 6, 151, =164=.
Non-drying oils, 132.
Non-essential elements, 4.
Non-reducing sugars, 39, 49.
Nonoses, 31.
Normal celluloses, =72=.
Nuclease, 189.
Nucleoproteins, 162, 175.
Nutrients, 1.

Octoses, 31.
[OE]nidin, 85, 116.
[OE]nin, =85=.
Oils, =129=.
Oil of bergamot, 148.
Oil of bitter almonds, 86, 148.
Oil of cassia, 148.
Oil of cinnamon, 148.
Oil of garlic, 148.
Oil of lavender, 148.
Oil of mustard, 148.
Olive oil, 130.
Opium, 158.
Organic acids, 18, =124=, 248.
Organized ferments, 183.
Ornamental pigments, =102=, 123.
Ornithine, 169.
Oryzenin, 176.
Osazones, 40, 41, 49.
Osmotic pressure, 213, 228.
Osones, 41.
Oxidases, 186, 190, 193.
Oxime, 44.
Oxycellulose, 73.
Oxycumarin glucosides, 81.
Oxygenated oils, =147=.
Oxyhydroquinone, 95.
Oxyproline, 169.

Paeonidin, 85.
Paeonin, =85=.
Palm oil, 133.
Papain, 189.
Papaverine, 155, =158=.
Para-dextran, 62.
Para-isodextran, 62.
Paralyzers, 196.
Para-pectin, =70=.
Parasites, 16.
Peanut oil, =133=.
Pectase, 71.
Pectinase, 189.
Pectins, 20, 31, 67, =70=.
Pecto-celluloses, =74=.
Pectose, 31, 70.
Pelargonidin, 85, =116=.
Pelargonin, =85=.
Pentosans, 31, 67, 68, 72.
Pentoses, 30, 162.
Pepsin, 167.
Peptids, =166=, 167, 176.
Peptones, 176.
Permeable membranes, 228.
Peroxidases, 190.
Persimmons, 100.
Persuelose, 36.
Phaeophytin, 107, 108.
Phaselin, 176.
Phaseolin, 176.
Phenol, 95.
Phenol glucosides, =79=.
Phenyl alanine, 168, =177=.
Phenyl hydrazine