z

CONTENTS.

mospherc.—Formation of Vegetable Mate-rials by the Organs of Plants.—VegetableHeat.—Of the Organs of Plants. —Of theBark, consisting of Epidermis, Parenchyma ,ind Cortical Layers.—Of Alburnum,or Wood.

—Leaves, Flowers , and Seeds.—Effects of theSeason on Vegetation. —Vegetation of Ever-greens in Winter.

CONVERSATION XX.

ON THE COMPOSITION OF ANIMALS. 214

Elements of Animals. —Of the Three principalMaterials of Animals, viz. Gelatine , Albu-men, Fibrine.—Of Animal Acids.—Of Ani-mal Colours, Prussian Blue , Carmine, andIvory Black.

CONVERSATION XXI.

i

ON TIIE ANIMAL ECONOMY. 235

Of the principal Animal Organs.—Of Bones,Teeth, Horns, Ligaments, and Cartilage. —-Of the Muscles, constituting the Organs ofMotion.—Of the Vascular System, for thaConveyance of Fluids.—Of the Glands, for theSecretion of Fluids.—Of the Nerves, consti-tuting the Organs of Sensation.—Of the Cel-lular Substance which connects the severalOrgans. —Of the Skin.

CONVERSATION XXII.

ON ANIMALIZATION, NUTRITION, AND

RESPIRATION. 253

Digestion.—Solvent Power of the Gastric Juice.