While, on the one hand, the disciplinary establishments increase, their mechanisms have a certain tendency to become 'de-institutionalized', to emerge from the closed fortresses in which they once functioned and to circulate in a 'free' state; the massive, compact disciplines are broken down into flexible methods of control, which may be transferred and adapted. Sometimes the closed apparatuses add to their internal and specific function a role of external surveillance, developing around themselves a whole margin of lateral controls. Thus the Christian School must not simply train docile children; it must also make it possible to supervise the parents, to gain information as to their way of life, their resources, their piety, their morals. The school tends to constitute minute social observatories that penetrate even to the adults and exercise regular supervision over them: the bad behaviour of the child, or his absence, is a legitimate pretext, according to Demia, for one to go and question the neighbours, especially if there is any reason to believe that the family will not tell the truth; one can then go and question the parents themselves, to find out whether they know their catechism and the prayers, whether they are determined to root out the vices of their children, how many beds there are in the house and what the sleeping arrangements are; the visit may end with the giving of alms, the present of a religious picture, or the provision of additional beds (Demia, 39-40). Similarly, the hospital is increasingly conceived of as a base for the medical observation of the population outside; after the burning down of the Hotel-Dieu in 1772, there were several demands that the large buildings, so heavy and so disordered, should be replaced by a series of smaller hospitals; their function would be to take in the sick of the quarter, but also to gather information, to be alert to any endemic or epidemic phenomena, to open dispensaries, to give advice to the inhabitants and to keep the authorities informed ,of the sanitary state of the region.