Abstract: Disclosed is a weighing balance having a material-receiving pan (3) and an indicator (4) that moves in a slot (5) of housing (1) to indicate the weight of the material along the graduated scale (6). On the opposite side of the slot (5) from the graduated scale (6) is provided a seat (7) defined by a wall (1a), end wall (9), base (2) and transparent wall (8) within which a notebook (11) is seated. The notebook (11) has a set of pages each carrying different graduation scales (13) along one edge thereof with a ring binding (12) arranged along the opposite edge thereof whereby the notebook (11) may be removed from the seat (7) and the pages moved about the ring binding (12) to bring a selected page to the front for visibility through the wall (8) when the notebook is again inserted in the seat (7).

Abstract: The weighing instrument has a receiving tray and an index mark displaceable in front of a fixed dial graduated in weight. It comprises means enabling the user to place, in a position enabling it to operate in association with said index mark, any one of several removable scales which are calibrated, for categories of foods of similar characteristics, in at least one of the magnitudes involved in dietetics and proportional to the weight of the foodstuffs placed on the tray. The instrument is useful in feeding in cases of obesity, diabetes, low calorie, low sugar, low protein, low fat or low residue, etc. diets.