94. I deduce that, being animals, consequently reproducible through generation and liable to corruption, they require food for the restoration of their corporeal substance wasted by effluvia: for the life of every sensible being consists in nothing else but the motion of the corporeal elements which flow and ebb, are acquired, lost and recruited by means of substances spirituous, yet material, assimilated by the living thing, either through the inhalation of air, or by the fermentation of food which spiritualizes its substance, as shown by the most learned Ettmuller (_Instit. Medic. Physiolog._, ch. 2). 95. Quia autem eorum corpus tenue est, tenui pariter, et subtili eget alimento. Hinc est quod sicut odoribus aliisque substantiis vaporosis, ac volatilibus suæ naturæ contrariis læduntur ac fugantur, ut constat ex historiis recitatis supra, nº 71. et 72., ita paribus rebus sibi convenientibus delectantur, et aluntur. Porro “=manna non est aliud, quam halitus aquæ, terræque, solis calore exacte attenuatus et coctus, a frigore secutæ noctis in unum coactus, densatusque=,” ut scribit Cornelius; manna dico, quam demissam de cœlo comederunt Hebræi, quæ toto cœlo differt a manna nostrate, quæ in medicinis adhibetur; nam hæc, ut scribit Ettmullerus Schroder. =Dilucid. Physiolog.=, c. 1. =de Manna=, fol. m. 154., “=nihil aliud est, quam succus quarumdam arborum tenuis, vel earum transsudatio, quæ nocturno tempore permixta cum rore, matutino tempore superventu caloris solis coagulatur, et inspissatur=.” Manna autem Hebræorum diversis orta principii calore solis non coagulabatur, sed vice versa liquefiebat, ut patet ex Scriptura, =Exod.= c. 16. v. 22. Manna ergo Hebræorum utpote constans ex halitibus tenuibus terræ et aquæ, profecto tenuissimæ erat substantiæ, utpote, quæ a sole solvebatur, et disparebat; optime ergo potuit esse talium animalium cibus, ita ut diceretur a David =Panis Angelorum=.