"Many insects stridulate by rubbing together specially modified parts of their hard integuments. This stridulation gen…"

"When a worm is suddenly illuminated and dashes like a rabbit into its burrow—to use the expression employed by a frie…"

"Mental Qualities.—There is little to be said on this head. We have seen that worms are timid. It may be doubted wheth…"

"Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, name…"

"That there is much suffering in the world no one disputes. Some have attempted to explain this in reference to man by…"

"It is nearly impossible to give an adequate idea of the higher feelings which are excited; wonder astonishment, and s…"

"A cell is a complex structure, with its investing membrane, nucleus, and nucleolus."

"It is not the strongest of the species that survives, nor the most intelligent, but rather the one most adaptable to …"

"In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting the…"

"After a time the minute colourless particles which are imbedded in the flowing protoplasm are drawn towards and unite…"