522 APPENDICES
October 20-January 1902. Temporary teaching position in
Schaffhausen.
December 18. E. applies for a position at the patent office in Bern.
1902 February 21. E. arrives in Bern. At first his only means of support are a
small allowance from the family and fees from tutoring in mathematics and
physics.
June 16. The Swiss federal council appoints E. on a trial basis as tech-
nical expert third class at the patent office in Bern, at an annual salary of
SF 3500. E. starts work there on June 23.
October 10. E.'s father dies in Milan.
1903 January 6. E. marries Mileva Marie.
Conrad Habicht, Maurice Solovine, and E. found the 'Akademie Olympia.'
December 5. E. presents a paper, 'Theory of Electromagnetic Waves,'
before the Naturforschende Gesellschaft in Bern.
1904 May 14. Birth of E.'s first son, Hans Albert (d. 1973 in Berkeley,
California).
September 16. The trial appointment at the patent office is changed to a
permanent appointment.
1905 March 17. E. completes the paper on the light-quantum hypothesis.
April 30. E. completes his PhD thesis, 'On a new determination of molec-
ular dimensions.' The thesis, printed in Bern and submitted to the Univer-
sity of Zurich, is accepted in July. It is dedicated to 'meinem Freunde Herrn
Dr M. Grossmann.'
May 11. The paper on Brownian motion is received.*
Jar>e 30. The first paper on special relativity is received.*
September 27. The second paper on special relativity theory is received.*
It contains the relation E = me^2.
December 19. A second paper on Brownian motion is received.*
1906 April 1. E. is promoted to technical expert second class. His salary is raised
to SF 4500/annum.
November. E. completes a paper on the specific heats of solids, the first
paper ever written on the quantum theory of the solid state.
1907 'The happiest thought of my life': E. discovers the principle of equivalence
for uniformly accelerated mechanical systems. He extends the principle to
electromagnetic phenomena, gives the correct expression for the red shift,
and notes that this extension also leads to a bending of light which passes a
massive body, but believes that this last effect is too small to be detectable.
June 17. E. applies for a position as Privatdozent at the University of
Bern. The application is rejected since it is not accompanied by the obliga-
tory Habilitationsschrift.
1908 February 28. Upon second application, E. is admitted at Bern as Privatdo-
zent. His unpublished Habilitationsschrift is entitled 'Consequences for the
constitution of radiation following from the energy distribution law of black
bodies.'*By the Annalen der Physik.