Previsualizar a impressão Fechar

Mostrar 158 resultados

Descrição arquivística
30 resultados com objetos digitais Mostrar resultados com objetos digitais
Letter from A. S. Eddington to Sarah Ann Eddington
EDDN/A/2/7 · Item · 7 Oct. 1912
Parte de Papers of Sir Arthur Eddington

Transcript

Passa Quatro
1912 Oct 7

My very dear Mother

We are getting near to the eclipse time now and our preparations are practically complete today. Nothing much remains but rehearsals & practices before the eclipse takes place. We have got two volunteers {1}, who are just the kind we wanted, young fellows whom we met and got to know on board the Arlanza. One of them Aguirre has been three years in England learning engineering and he is a great help; the other Andrews is of an English family but was born in Brazil and speaks rather broken English. The Brazilian government pays all their (and our) expenses here. They arrived here last Thursday {2}.

We are a very large party here now as there are four expeditions with their volunteer assistants and so on. We all have déjeuner together at the station and dinner at the hotel. Some of the later arrivals sleep out in other houses.

We are having a very pleasant time here though there is plenty of work to do. We (ie the Greenwich party) make tea at the camp every afternoon on a wood fire; and we have a great deal of fun. Yesterday (Sunday) we took a half-holiday (for the first time) and had a beautiful walk. We did not get very far as there was so much to stop and see. Aguirre was a good guide and able to tell us what the plants were. The bamboos growing in clumps are very graceful. The banana trees (in flower now) look very ragged and ugly. The castor oil plants and wild pineapples (not edible) are very abundant. The ants are very interesting here; the white ants’ nests being often taller than a man. We are not much troubled with insects and have seen no mosquitoes. We had coffee in the afternoon at a little wayside shop; it was quite an amusing experience.

Last night there was a cinematograph performance and nearly 20 of us went to it (the Brazilian government paying for us!!) The performance was not very interesting, but the village audience was decidedly so.

You would be amused to see us all riding down to the Fazenda (eclipse camp) on an engine. There were about 20 of us today clinging on in various places—the cow-catcher is the best seat.

I do not expect to reach England until Nov 9 and have given up thoughts of the earlier boat. I was very glad to have your letter of Sept 11.

The rooms at the hotel are very bare of furniture. I am writing this at the camp as there is practically no opportunity at the hotel. Dinner occupies most of the evening lasting from 7 to 9. It is a terribly complicated affair of about 12 courses, chiefly meats of various kinds.

We have had a few wet days last week but yesterday and today have been beautiful days.

With very dear love from
your affectionate son
Stanley

—————

Letter-head of the Royal Observatory, Greenwich. Numbered ‘7’ at the head in pencil.

{1} Olyntho Couto de Aguirre and Leslie Andrews. See the Report in MNRAS, lxxiii, 386.

{2} 3rd.

Chapter II: Multiplicity Factors
EDDN/B/1/4 · Item · June 1944
Parte de Papers of Sir Arthur Eddington

§ 12. Complementary fields.
§ 13. The rigid-field convention.
§ 14. Separation of field and particle energy.
§ 15. Application of scale-free systems.
§ 16. The ‘top particle’.
§ 17. Standard carriers.
§ 18. Mass-ratio of the proton and electron.
§ 19. Rigid coordinates.
§ 20. The fine-structure constant.
§ 21. The inversion of energy.
§ 22. Mutual and self energy.
§ 23. Comparison particles.

Chapter III: Interchange
EDDN/B/1/5 · Item · June 1944
Parte de Papers of Sir Arthur Eddington

§ 24. The phase dimension.
§ 25. Interchange of suffixes.
§ 26. The two-particle transformation.
§ 27. Hydrocules.
§ 28. Separation of electrical energy.
§ 29. Current masses of the proton and electron.
§ 30. Molarly controlled charge.
§ 31. Secondary anchors.
§ 32. Calculated values of the microscopic constants.
§ 33. The Coulomb energy.

EDDN/B/1/15 · Item · [Sept. 1944 and 1946]
Parte de Papers of Sir Arthur Eddington

Chapter XII [continued].
§ 125. Symbolic occupation.
§ 126. Einstein-Bose particles.
§ 127. Photons.
§ 128. Life-time of the mesotron.

Chapter XIII: Epistemological Theory.
[§§ 129–136.] As in Proceedings of the Cambridge Philosophical Society, vol. xl (1944), p. 37, expanded.

Chapter XIV. Summary.
§ 137. The principles of fundamental theory.

Chapter II: The Complete Momentum Vector
EDDN/B/2/16 · Item · [before July 1942]
Parte de Papers of Sir Arthur Eddington

§ 2∙1. Particles with spin.
§ 2∙2. Relativity rotations.
§ 2∙3. Neutral space-time.
§ 2∙4. Strain vectors.
§ 2∙5[a]. Reality conditions.
§ 2∙5[b]. Flat space-time.
§ 2∙6. Determinants and eigenvalues.
§ 2∙7. Phase space.
§ 2∙8. Probability distribution of strain vectors.

(§§ 2∙1 and 2∙2 were renumbered from 1∙1 and 1∙2 and, as a result, §§ 2∙3, 2∙4, and 2∙5[a] were renumbered from 2∙2, 2∙3, and 2∙4 respectively; but the necessary alterations to the numbering were carried no further. The title of § 2∙8 was altered from ‘Probability distribution of phase space’.)

Chapter IV. The Energy Tensor
EDDN/B/2/21 · Item · [before July 1942]
Parte de Papers of Sir Arthur Eddington

§ 4∙1. Double frames.
§ 4∙2. Interchange.
§ 4∙3. The dual frame.
§ 4∙4. Double phase space.
§ 4∙5[a]. The relation between mass and density.
§ 4∙6. [Untitled.]
§ 4∙5[b]. [Untitled.]

EDDN/B/2/25 · Item · [before July 1942]
Parte de Papers of Sir Arthur Eddington

[Summary of Chapter IV.]

Chapter IV: Exclusion and Interchange.
§29. The phase coordinate.
§30. Mutual and self energy.
§31. Elision of comparison particles.
§32. Exclusion.
§33. The negative energy levels.
§35. The factor 3/5.
§36[a]. Interaction of V10 particles.
§38. Interchange.
§37[a]. The Newtonian potential.
§37[b]. The Newtonian potential.
§36[b]. The Newtonian potential.

EDDN/B/2/30 · Item · [c. Mar. 1943]
Parte de Papers of Sir Arthur Eddington

Chapter VI: Wave Vectors.
§ 54. The linear wave equations.
§ 55. Matrix representation of E-numbers.
§ 56. Factorisation of E-numbers.
§ 57. Wave vectors and tensors.
§ 58. Space tensors of the second rank.
§ 59. Angular momentum.
§ 60. Symbolic coefficients in ξ-space.
§ 61. The differential wave equation.
§ 62. The eigen-scale.
§ 63. Perturbation theory [title only].

Chapter VII: The Hydrogen Atom and the Neutron.
§ 63. Symmetric degeneracy.

EDDN/B/3/19 · Item · [before June 1942]
Parte de Papers of Sir Arthur Eddington

Abstract.

§ 1. Introduction.
§ 2. The theoretical formulae.
§ 3. Comparison of theory and observation.
§ 4. Values of the constants.
§ 5. The problem of consistency.
§ 6. The β-coefficients.
§ 7. The constant e/mec.
§ 8. The constant h/e.

(This manuscript, which is marked as having been received by the Physical Society on 8 June, was evidently used as the copy for the text printed in the Society's Proceedings.)

Draft of a testimonial by A. S. Eddington for W. M. Smart
EDDN/A/5/3 · Item · 21 May 1936
Parte de Papers of Sir Arthur Eddington

Transcript

Observatory, Cambridge
21 May 1936

Dr W. M. Smart’s application for the Chair of Regius Professor of Astronomy in the University of Glasgow has my warmest support. He is a man of established reputation in astronomical circles who would fill the office with distinction; and he has proved himself very successful as a lecturer and teacher. He would be much missed from this Observatory and from the University; but promotion to a professorial chair would be a fitting recognition of his work.

Dr Smart has been Chief Assistant in the Observatory and John Couch Adams Astronomer since 1921. There is only one other Assistant. The policy of the Observatory has been to avoid routine undertakings and to develop new methods. Two main lines of work have been developed during his tenure—an improved method of determining photographic proper motions of stars, and measurement of stellar magnitudes with a photo-electric cell. As regards the former it may, I think, be claimed that the Cambridge results set a new standard of accuracy for large series of proper motions. Photo-electric work is still confined to two or three observatories (Cambridge being the only British one). After a long struggle with pioneer difficulties the work is now proceeding with great success, and astonishing accuracy is obtained. A large share of the credit for these results is due to Dr Smart.

On the theoretical side his earlier work was in celestial mechanics. But in connection with the practical work above-mentioned his more recent interests have {1} been mainly in proper motions and other branches of stellar statistics, to which he is one of the most active contributors. He is a member of the Commission of the International Astronomical Union on Stellar Parallaxes and Proper Motions.

His teaching work covers elementary lectures on astronomy, advanced lectures on celestial mechanics and on stellar motions and a practical class at the observatory. Judging from the response of the students he is a stimulating lecturer. He normally supervises one or two research students.

An important part of his experience is his work as Secretary of the Royal Astronomical Society during the last five years. This brings him into touch with astronomers in all parts of the world, so that he is in full contact with all modern developments. It is perhaps not irrelevant to mention that he is Treasurer of the Royal Astronomical Society Dining Club—an office (of which the duties are by no means confined to the care of money) which is a tribute to his popularity with his colleagues.

To sum up:—He has shown himself able to make the most of the resources of a small observatory; he is well-known and esteemed internationally; he is successful with students; and is well used to administrative activity.

—————

The various cancelled words and passages in this letter have not been recorded, except for the mistaken deletion noted below.

{1} Struck through by mistake.