Wants 100 of JH's star forms. Wants any information on a collection of observations of Venus.

Informs JH that he has published a new edition of his tracts (to turn Cambridge mathematics to physical applications). Wants his permission to use his theory on biaxial crystals. Remarks on David Brewster's theories and experiments.

Has been making optical experiments. Hopes to see JH in the Spring. Hopes JH will be able to observe Encke's comet this year.

Will he be visiting Cambridge this Spring?

Observations on the various ways of measuring angular positions (of double stars). Opinion on JH publishing his catalogue of nebulae. Remarks on the low standard of astronomical observations in England compared with the Continent.

Observations on the gravimeter.

Requests that the engravings for the catalogue of nebulae be speeded up. Further observations on the gravimeter. Observations on W. R. Hamilton's experiments on biaxial crystals using A. J. Fresnel's wave surface theory.

Requesting a copy of G. A. A. Plana and Francesco Carlini's 'Lunar Theory.' Further remarks on the practicability of the gravimeter.

Inviting JH to his house if he attends the meeting of the B.A.A.S. Proposes to visit JH in London.

Observations on the work of S. D. Poisson and P. G. le D. Pontecoulant. Is JH's 20-ft. telescope any use for measuring angles and distances? Discussion of solar spots.

Copy of letter to Hugh Percy (3rd Duke of Northumberland) stating that the Duke's offer of a refracting telescope of great power, to Cambridge Observatory would be a valuable gift. To JH: Remarks on gift of telescope, planet reduction money, and on his geological exploration of the Charnwood Forest.

Has visited Hugh Percy (3rd Duke of Northumberland) at Buxton, who suggests that JH approaches R. A. Cauchoix for the glass for the new telescope.

Further discussion of the telescope being donated by Hugh Percy (3rd Duke of Northumberland).

Summary of the letter of same date sent to JH at Slough (HS.1.60).

Has not been requested to settle the affair about Henry Taylor and the Stephen Groombridge business. Would JH send him what he has ready for printing, with directions? Observations on the 4th satellite of Jupiter.

Observations on the weather of the past winter. 42 Virginis. Printing of [Stephen] Groombridge's catalogue. Has written article for the Penny Cyclopaedia. Refracted light in prisms. Machine for polarization of the sky. Petition to Parliament to abolish religious tests for degrees at Cambridge.

Summary of GA's 1834-4-24, with additional information that he has written a book entitled Gravitation. Confusion over 42 Virginis. Affair between James South, and Edward Troughton and William Simms has been referred to arbitration. Experiments on Newton's rings by transmission. Letter to Thomas Maclear about his mural circle. Saw the eclipse of 16 July. Tarnish of JH's mirrors. R. A. Cauchoix's delay with telescope. [The final two pages of this letter are from Richarda Airy to Margaret Brodie Herschel.]

Abstracts of barometrical pressure in various parts of the earth. Has used James South's equatorial with Richard Sheepshanks's clockwork attached. Constitution of Paris Observatory being changed. D. F. J. Arago's experiments on glass and metal. Humphrey Lloyd's experiments on reflected light. Edinburgh's Observatory site likely to be changed. John Pond (Astronomer Royal) has been asked to resign. Thomas Maclear's Cape circle. Reasons for the delay in delivery of R. A. Cauchoix's telescope to Cambridge. House of Lords and Commons burnt down.

Has just been made president of the R.A.S. No news of John Pond's retirement. R. A. Cauchoix's telescope has arrived. Printing of his 1834 observations are well advanced.

Sends his 1834 observations. Has received JH's weather observing instructions. Likely to accept the post of Astronomer Royal when John Pond resigns. Further remarks on new telescope and of E. J. Cooper's (near Sligo) - planetary disks - errors of divisions of circles. Possibility of small observatory in Upper Canada.