WE have received vol. 5, No. 1 of the Journal of the British Interplanetary Society, a body “founded for the stimulation of public interest in the possibility of interplanetary travel, the dissemination of knowledge concerning the problems which the epock-making [sic] achievement of an extra-terrestrial voyage involves, and the conducting of practical research in connection with such problems”. This number of the Journal contains designs for a “space ship” intended to perform a voyage to the moon and back. While we may invite the charge of obstructionism if we dismiss the whole affair as a wild-cat speculation, it is necessary for us to remark that, while the ratio of research results accomplished to speculative theorizing is so low, little confidence can be placed in the deliberations of the British Interplanetary Society.