Has been absent the whole summer and fears that his letter acknowledging his election to the Astronomical Society may have gone astray. Is grateful for the honor. Sends a paper of his own on a new method of making observations with the heliotrope. Comments on the usefulness of this instrument.

Many thanks for his communications, especially for the one on light. This may be translated into German by J. E. E. Schmidt, and he would be grateful if JH would authorize this to be done.