To read scales, you need to know what each division represents.
To do this:-
This then gives the value of each division
Example
Example
What is the measurement at the level of the red dot ?
The difference is 500 ml and there are 4 sections.
So each pip is worth 125 ml.
The dot is 3/4 of 500ml.
Example
What is the measurement at the level of the red dot ?
To find each pip :
Red dot :