9) What is the additive constant , if adopting on anallatic lens in the telescope of a tacheometer?

10) Which is used for measuring the stadia intercept ?i? from the diaphragam?

11) Which is used to measure the distance ?d? between the optical centre and the vertical axis of the instrument?

12) Where the tacheometer is usually adopted for surveying?

13) What is the distance of station from the insturments if on fixed hair method the line of sight is horizontal with multiplying and additive constant is 100 and 0.5 respectively S =1.500?