CONTENTS. 
INTRODUCTION. 
THE CELL.—Protoplasm. Growth and formation of the cell. Struc- 
ture of organic substances. Multiplication of cells. : 
DIVISIONS OF ZOOLOGY.—Morphology. Development. Histology. 
Paleontology. Taxonomy. Physiology, Distribution. 
THEORY OF DESCENT.—Natural Selection. 
CLASSIFICATION 
DIFFERNCES BETWEEN PLANTS AND ANIMALS 
PART I. 
THE MICROSCOPE. 
DESCRIPTION OF THE INSTRUMENT—The Body. The Stage. The 
Mirror. The Stand. Practical hints. The work table. 
EXERCISE I.—Linen Fibres ... 
EXERCISE IJ.—Transparent objects 
EXERCISE I[II.—Opaque objects 
EXERCISE [V.—Air bubbles and oil globules 
EXERCISE V.—Brownian movements 
EXERCISE VI.—Ciliary movements 
EXERCISE VII.—Muscular fibre 
Exercise VIII.—The examination of small active animals 
