Chapter 1

Page I xi: page number H 29 (section The Skeleton) changed to H 28.

Page I xvii: [See also experiments with candle and breath, in
Introduction to Human Biology.] and related hyperlinks changed to
[See also experiments with candle and breath, in The Principles of
Biology.] and relevant hyperlinks.

Page P31: Fig. B has been rotated 90°.

Page P 89: ... at their middles on either side the opening, ...
changed to ... at their middles on either side of the opening, ....

Page P 91: ... the table on page =88= ... changed to ... the table on
page 88 ....

Page A8: (Fig. 389.) changed to (Fig. 390.)

Page A 42: ... a test with live worm ... changed to ... a test with a
live worm ....

Page A 91: Parenthesis deleted from ... Where does a Scarab (or
sacred beetle ....

Page A93: Illustration caption Fig. 177 added.

Page A 94: parenthesis deleted from (Does the size of its nerve
ganglia ....

Page A 143, caption with Fig. 270: ... lr, liver ... changed to ...
le, liver ....

Page A 174: Describe the molting process (page 120) changed to
Describe the molting process (page 157).

Page A 177: D¹ Bill hooked, ... changed to D₂ Bill hooked, ....

Page A 193: C¹ Head large; ... changed to C₁ Head large; ...; C¹ Five
toes, ... changed to C₁ Five toes, ...; Dolphin (379, 397) changed to
Dolphin (Figs. 379, 397).

Page A 200: (See Fig. 347.) changed to (See Fig. 349.)

Page H 17: question mark deleted from ... a cotton cloth of same
weight and texture?

Page H 25: ... keeping the body cool during the exertion (Exp. o)
changed to ... keeping the body cool during the exertion (Exp. 5).

Pahe H 38: ... sit far back in the chair (Figs. 60, 61, 62) ...
changed to ... sit far back in the chair (Figs. 49, 50, 51) ....

Page H 54: ... blood vessels must have these three properties?
changed to ... blood vessels must have these three properties.

Page H 56: Fig. 57 rotated 180°.

Page H 70: (See Animal Biology, p. 14.) changed to (See Animal
Biology, p. 4.)

Page H 72: Make a model like sketch ... changed to Make a model-like
sketch ....

Page H 110, Fig. 101: individual elements rotated 90° clockwise.

Page H 140 (footnote): closing quote mark inserted after ... how to
harmonize color with herself.

Page H 158: parenthesis deleted after ... 200 diameters, or 40,000
areas).

Index: some page numbers corrected and book (I, P, A or H, see above)
letters added.