| November 15, 1899 | The Hanover Congress – Karl Kautsky (condensed) | Vol. III No. 11 |
| December 15, 1900 | Class War and Ethics – Karl Kautsky | Vol. IV No. 12 |
| February 15, 1901 | Class War and Ethics – Dr Forster and Karl Kautsky | Vol. V No. 2 |
| October 15, 1901 | Extracts from the Letters of Engels to Marx | Vol. V No. 10 |
| August 15, 1905 | Frederick Engels – Paul Lafargue | Vol. IX No. 8 |
| September 15, 1905 | The East Asiatic War and the Militia (Citizen Army) – Rudolf Kraft | Vol. IX No. 9 |
| January 15, 1908 | The British in Egypt, Translated from Die Neue Zeit – Theo Rothstein | Vol. XII No. 1 |
| May 15, 1908 | On the Road to Liquidation – W. Kossowsky | Vol. XII No. 5 |
| October 15, 1908 | Alcohol and Women’s Labour – F. Van der Goes | Vol. XII No. 10 |
| September 15, 1909 | The Limitation of Naval Armaments – G. Ledebour | Vol. XIII No. 9 |
| February 15, 1910 | English Liberalism and the Labour Party – J. Köttgen | Vol. XIV No. 2 |
| April 15, 1910 | The Socialism in Japan – S. Katayama | Vol. XIV No. 4 |
| July 15, 1910 | The Budget of the German Workman A Statistic of Misery I – A Lipschutz | Vol. XIV No. 7 |
| August 15, 1910 | The Budget of the German Workman A Statistic of Misery II – A Lipschutz | Vol. XIV No. 8 |
| September 15, 1910 | The Budget of the German Workman A Statistic of Misery III – A Lipschutz | Vol. XIV No. 9 |
| March 15, 1911 | Edouard Vaillant | Vol. XV No. 3 |
| March 15, 1912 | Democratic and Syndicalist Illusions – Gustave Eckstein | Vol. I No. 3 |
| April 15, 1912 | Democratic and Syndicalist Illusions (continued) – Gustave Eckstein | Vol. I No. 4 |
| July 15, 1912, | Victor Adler Reminiscences on the Occasion of his Sixtieth Birthday. – Karl Kautsky | Vol. I No. 7 |
| August 15, 1913 | Capitalist Concentration in France – Compère-Morel | Vol. II, No. 8 |
| September 15, 1913 | Capitalist Concentration in France – Compère-Morel | Vol. II, No. 9 |
| December 15, 1913 | The Dangers of Reformism – Otto Bauer | Vol. II, No. 12 |