Gives Charles Bell’s explanation of the contraction of the orbicularis during screaming and seeks confirmation of his view because the action is "the key-stone of a whole class of expressions". Curious to learn WB’s conclusion in regard to the relation between contraction of the orbicularis and secretion of tears. Notes that voluntary contraction of the orbicularis causes no tears.

Thanks JB for his information. Has heard of analogous cases to JB’s observations on [colours of] crossed rats; the offspring of white and grey mice are stated to be either white or grey and never piebald.

Finds important differences between English and German versions of Variation on graft-hybrids.

Experiments and observations on submerged flowers.

No summary available.

On the changes in plumage of scarlet ibis at the zoo in breeding season.