Answer:
This is the number of degrees Fahrenheit.
Explanation:
For example, the 140 means 140 degrees. So, count the number of lines above 140... you'll see two more lines above, so the temp. is 142 degrees Fahrenheit.
Unless the lines mean a certain number. Such as 'each line means five'.
Do the directions mention an amount per line? If so, tell me in the comments. I cannot help if I don't know!
:)