xx LIST OF TEXTS 128. To Mileva Maric, 17 December 1901 325 129. To the Swiss Patent Office, 18 December 1901 327 130. To Mileva Maric, 19 December 1901 328 131. To Mileva Maric, 28 December 1901 329 132. Receipt for the Return of Doctoral Fees, 1 February 1902 331 133. To Conrad Habicht, 4 February 1902 331 134. To Mileva Maric, 4 February 1902 332 135. Advertisement for Private Lessons, 5 February 1902 334 136. To Mileva Maric, 8? February 1902 334 137. To Mileva Maric, 17? February 1902 335 138. Pauline Einstein to Pauline Winteler, 20 February 1902 336 "On the Thermodynamic Theory of the Difference in Potentials between Metals and Fully Dissociated Solutions of Their Salts and On an Electrical Method for Investigating Molecular Forces," April 1902 [text in Vol. 2] 337 139. To Conrad Habicht, April? 1902 337 "Kinetic Theory of Thermal Equilibrium and of the Second Law of Thermodynamics," June 1902 [text in Vol. 2] 337 140. The Swiss Department of Justice to the Swiss Federal Council, 2 June 1902 338 141. From the Swiss Department of Justice, 19 June 1902 339 142. From the Swiss Patent Office, 19 June 1902 340