Glad to read what CD sends. Any glimmer of light on those subjects is of utmost importance.

Quotes a letter from Haeckel on progress of Darwinism in Germany.

Describes the floral structure of the lupin and gives his observations on its pollination by bees.

Discusses several subjects, including examples of "Unity of coloration",

the origin of gall-producing poison,

Wagner’s theory of viviparous larvae,

and stridulation in insects.

Sends a reference supporting CD’s statement in Origin that flies check propagation of horses and cattle.