1. See, for example, Leibniz’s remarks in his letter to Conring dated 29 March 1678 (A II i 399). In the Hypothesis physica nova he says that he has always believed in the admirable wisdom of the Creator, “ita res instituisse, ut paucis multa gerantur” (A VI ii 244, ¡ì 51).
2. See Leibniz’s letter to Fabri written towards the end of 1676: “Nimirum tentandum putabam an non phaenomena naturae difficiliora ex aliis quibusdam phaenomenis manifestis atque exploratis deduci possent” (A II i 290).
3. Hypothesis physica nova ¡ì 58 (A VI ii 249). Sometimes in this context only gravity and elasticity are referred to ¡ª see for example Leibniz’s letter to Conring of 8 February 1671: “In summa statuo, duas esse causas omnium phaenomenorum naturalium globi nostri, gravitatem et vim elasticam seu restitutivam sui post compressionem vel dilatationem, in statum priorem” (A II i 80).
4. Hypothesis physica nova ¡ì 57 (A VI ii 248); Leibniz’s letter to Pierre de Carcavy of 22 (?) June 1671 (A II i 126). See also his letter to Martin Fogel dated 3 May 1671 (A II i 99).
5. See Leibniz’s letter to Fabri written towards the end of 1676: “Ubicunque motus est turbatus, conatus est ad aequabilitatem” (A II i 292). The same model is also used for example in the Propositiones quaedam physicae written in Paris (A VI iii 20–22) and early writings on acoustics ¡ª see Gottfried Wilhelm Leibniz, Nachgelassene Schriften,mechanischen und technischen Inhalts, ed. Ernst Gerland (Leipzig: Teubner, 1906), p. 29.