| 摘要 |
In order to rapidly calculate the dose, particularly of food for a baby or an adult, and the dose of a drug for the treatment of a patient, a ruler according to the present invention is used which is comprised of a fixed sector (1) and a sector (2) sliding with respect to the fixed sector (1), wherein each sector (1, 2) presents two logarithmic scales of values of two parameters selected amongst the weight A, the specific quotient of the substance B in question, the relative coefficient B of the weight of the substance, the weighted or volumetric dose D, and wherein each scale of a sector (1, 2) is juxtaposed to a scale of the other sector. In order to enable, while simultaneously effecting a division and a multiplication, to verify the relation A/D x C = D and any relation reducible thereto. |
