The work intends to give a general view of the apparatus used in Physics laboratories.
  The virtual exhibit has been divided into two parts:
     1) one regards the apparatus made between the second half of the nineteenth century and the first
         half of the twentieth century;
     2) in the other are showed the apparatuses made in the second half of the twentieth century.
  The apparatuses are only those present in the indicated schools of Sassari.
  The structure of the work presents a general catalogue where all the apparatuses are listed and particular catalogues for the apparatuses of each school.
  In the case of apparatuses with the same characteristics, in the general catalogue only one card is present, while the cards of the similar apparatuses are in the catalogues of each school.
  However, from the cards of the general catalogue it is possible to call the photos of these apparatuses.