1 Table of Contents: “... Britain -- 9 Recessive Melanism in the Moth Lasiocampa quercus -- 10 Speculations about Mimicry with Henry...”

2 Table of Contents: “... of the Exchanger and Pump in Breathing Strategy: the Ideal High-performance Lung -- 4 Speculations on the Evolution...”

3 “...Circadian rhythms are such an innate part of our lives that we rarely pause to speculate why...”

4 “... matter to speculate about the possible ways in which tension generation and shortening might occur...”

5 “... speculations, playing the various schools of thought against each other, provid­ ing arguments in favor...”