x x x i i L I S T O F T E X T S 498. Message on the Jewish National Fund for the Einstein Jubilee Celebration in New York, after 13 April 1929 Jewish Daily Bulletin, 18 April 1929 See documentary edition for English text 499. From Heinrich Zangger, 15 April 1929 Not selected for translation 500. Message to the Einstein Jubilee Celebration in New York,  16 April 1929 See documentary edition for English text 501. To Max Erlanger, 16 April 1929 502. “Einstein Urges Support for Scientific Institute,” 17 April 1929 Jewish Daily Bulletin, 17 April 1929 See documentary edition for English text 503. “Appeal by the International Trotsky Assistance Committee (Germany),” 20 April 1929 “Aufruf der Internationalen Trotzki-Hilfe (Deutsches Komitee)” Die Menschenrechte IV, 4/5 (20 April 1929) 504. “Appeal for Henri Guilbeaux,” 20 April 1929 “Aufruf für Henri Guilbeaux” Die Menschenrechte IV, 4/5 (20 April 1929) 505. To Elsa Einstein, 20 April 1929 506. Message for an ORT Fund-Raising Campaign, 22 April 1929 The New York Times, 22 April 1929 See documentary edition for English text 507. To Elsa Einstein, 22 April 1929 508. “Einstein Believes in ‘Spinoza’s God,’” 24 April 1929 The New York Times, 25 April 1929 See documentary edition for English text 509. Patent for Sound Reproduction Using Magnetostriction, 25 April 1929 “Vorrichtung insbesondere für Schallwiedergabegeräte, bei der elektrische Stromänderungen durch Magnetostriktion Bewegungen eines Magnetkörpers hervorrufen” Reichspatentamt Patentschrift Nr 590 783 Not selected for translation 510. To Ethel Michanowsky-Charol, 25 April 1929 See documentary edition for English text 511. “On Aurel Stodola,” between 27 April and 12 May 1929 “Stodola” Neue Zürcher Zeitung, 12 May 1929