Summary

Observations on unusual mating behaviour of canaries.

Summary

Describes formation of student nature study club at the University of Jena. Sends birthday greetings from the club.

Summary

Describes data relating to variability of Primula elatior.

Summary

Describes his collections and research on Brazilian insects, especially Orthoptera. Comments on insect phylogeny.

Summary

His research on Orchis maculata.

Discusses effect of disuse of anthers in Salvia officinalis.

Pleased CD can use his observations on Primula elatior.

Summary

Thanks for gift of Movement in plants.

Plans botanical research in Brazil.

Hermann von Jhering is conducting experiments on snakes.

WB obliged to work as newspaper correspondent.

Plans breeding experiments on dimorphic plants.

Summary

Arrived in Brazil three months ago. Studying insects and plants, but work suffers from lack of scientific literature.

Fritz Müller has written to him to observe relations between ants and plants.

Writing popular articles about evolution for German newspaper in Brazil.

Sends paper from Kosmos.

Expects to spend several years in Brazil.

Summary

Observations on pollinia of Orchis maculata

and on Primula elatior. [On latter, see Forms of flowers, p. 34.]