Chair of Botany at Edinburgh is now vacant and Joseph Hooker intends applying for it. Would be grateful if JH would supply a testimonial for Hooker. There is only one other candidate for the position.

Remembers taking him round the chemical works of Losh, Wilson and Bell, but is unable to give any news of the manuscript as Mr. Losh is away on the continent. Hopes he will visit them again in the future.

Has submitted a paper on the projection of a star on the moon's disc to the R.A.S. Wishes to draw JH's attention to it. Comments on some of his observations.

Sent him a paper on differential equations about a month ago and wonders if it has gone astray as he has heard nothing from JH.

Regrets any inconvenience he has caused but is grateful for JH's act and offer to communicate his paper to the R.S.L.

Wishes he had seen JH's paper before submitting his own; then he could have rectified his errors. Has been carrying out some electrical experiments. Sent abstract to Michael Faraday, who does not understand them. Would be pleased to send JH further scientific communications.

Has been investigating the Cavendish experiments recently repeated by Francis Baily. Thinks G. B. Airy has neglected the resistance of the air in his mathematical theory. Would like to send an abstract of his investigations so that JH can judge their merits.

Is grateful for his letter on the Cavendish experiment. Gives outline of his own theories regarding certain aspects of the Cavendish experiments, and would like his opinion on these before they are incorporated into a paper.

Sends his manuscripts. Discusses some of Michael Faraday's experiments, in particular his theory on the non-magnetism of blood. Has sent Faraday a paper on the action of voltaic currents.

Thanks for prompt reply. Does know something about blood and circulation, but may not have expressed himself clearly. Thinks Michael Faraday has made important discoveries in magnetism and electricity.

Agrees wholeheartedly with JH's recommendation for his paper. Will rewrite it if necessary. Hopes JH will produce a second edition of his work on finite differences.

Is having an astronomical clock constructed and would like his advice on the calculation of some of the movements. Gives a brief description of the clock.

Last letter to JH was private [see GA's 1845-4-1].

Thanks for his letter but it does not allude to the calculation he sent. Has seen astronomical clocks previously.

All N. L. Lacaille's observations have been reduced and a complete catalogue sent to Francis Baily to be incorporated into the catalogue of the R.A.S. Hopes Baily is recovering his health.

Has received a series of observations from Thomas Maclear on Alpha1 and Alpha2 Centauri. Comments on these observations and gives results made by the old circle.

Thanks for letter and printed address and for the favorable notice of his investigations into Alpha Centauri. Comments on these and some of his observations on other stars. Encloses a note of the position of seven circumpolar stars.

Gives the parallaxes of a few southern stars obtained from his own mural circle. Has sent his memoir on Alpha Centauri to the R.A.S.

Sending the results of his calculations of the parallaxes of the southern stars. Has recommended these stars to Thomas Maclear to observe.

Has had a reply from Thomas Maclear stating that all work has ceased at the Cape Observatory until the work on calculating the Arc of the Meridian has finished. F. W. Bessel has expressed a wish that Centaure should be observed with a heliometer. Wishes a good heliometer could be sent to the Cape.