The successive perfectionings, the acceptance of some air-tight parameters and the negation of great part of these (not acceptance of the talismans, for example), had been essential stop estruturao of modern science. The capacity to work with the hands, agreed with the curiosity, had made of the man an active inventor, who does not limit itself already to take the world he found as it, but more looks each time to mold it its imagined necessities, Reals or. From there its constant experimentation of possible materials for food, clothes, habitation, the insistent hollowings in the land to extract metals whose existence hardly could suspect to the departure; the allure for the fire and the water, and its respective effect in the panificao, the drying and the fermentation, the constant to go deep of the causal knowledge in the technological adaptation of the ways to the ends, such the case of the invention of a series of old instruments and simple machines. (grifo ours) One of the biggest contributions of the air-tight operations to the practical accomplishments of modern applied science was the use and the reverence to ' ' nmero' ' , considering the root of all the truth. According to Yates French, the renascentista magic pontuava the number as a possible key of operations, being that subsequente history of the accomplishments of the man, in applied science, demonstrated that the number is really one ' ' key-mestra' '. As the project of the magic and the cabala formulated for Henrich Agripa, had a special place for genuine mathematical sciences and its applications with objective to produce ' ' operaes' ' in the world. For Agripa, that one that was turned in mathematics could execute wonderful accomplishments by means of ways purely mechanics. Thus, one mago that it knows ' ' the natural philosophy and the mathematical, also understanding of mechanics, can make extraordinary things and mago must know sciences that produce such wonders, as necessary part of its treinamento' '.