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| 11 | Solution of certain differential equations which do not admit separation of variables |
| 75 | Solution of a problem proposed in the Nova Acta Eruditorum in November, 1743 |
| 79 | A problem of geometry proposed publicly by an anonymous geometer |
| 80 | Opuscula varii argumenti |
| 84 | Observation by Leonhard Euler on sections 83 and following of the preceding book, concerning elastic curves |
| 85 | Solution to a catoptric problem proposed in this journal in September 1745 on page 523 |
| 100 | On Amicable Numbers |
| 106 | Solution to the catoptric problem in Novis Actis Eruditorum Lipsiensibus proposed in November 1745 |
| 119 | On vibrations of excited chords |
| 121 | Physical conjectures on the propogation of sound and light with other dissertations: on amicable numbers, on natural equations, and on the rectification of ellipses |
| 156 | Opusculorum tomus III. continens novam theoriam magnetis ab illustr. academia regia scient: Parisina praemio condecoratam a. 1744. |
| 211 | Problema, ad cuius solutionem geometrae invitantur; theorema, ad cuius demonstrationem geometrae invitantur |
| 445 | Proof that every integer is the sum of four squares |