[Footnote 22]: Added ’.’ (The refracting character of differently-formed lenses is illustrated in the works on Natural Philosophy, to which the pupil is referred.)
[Page 407, Fig. 142]: Added ’.’ (Fig. 142. The forms of the different lenses. 1, A plane lens. 2, A globe lens. 3, A convexo-convex lens. 4, A plano-convex lens.)
[Page 407, Fig. 142]: Added ’.’ (4, A plano-convex lens. 5, A concavo-concave lens. 6, A plano-concave lens. 7, Meniscus. 8, A concavo-convex lens.)
[Page 416]: Changed ’.’ to ’?’ (Where is the wax of the ear secreted? 948. Describe the membrana tympani.)
[Page 417]: Was ’, 1,’ (This figure is highly magnified. 1, 1, The cochlea. 2, 3, Two channels, that wind two and a half turns around a central point)
[Page 421]: Was ’Eustuchian’ (This is the result of the air in the middle ear escaping through the Eustachian tube, when the vibrations of the membrana tympani are violent.)
[Page 422]: Added ’.’ (969. Many of the parts just enumerated aid in hearing, but are not absolutely essential to this sense. But if the vestibule)
[Page 422]: Added ’.’ (Note. Let the anatomy and physiology of the organs of hearing be reviewed, from fig. 148, or from anatomical outline plate No. 10.)
[Page 439]: Added ’.’ (know the proper mode of procedure in such cases, in order to render immediate assistance when within his power.)
[Page 441]: Added ’.’ (1035. What is the antidote? 1036. What should immediately be done when arsenic is swallowed?)