Chart No. 0 is white and is rated as being 100% white or zero black. No. I chart is rated as 80% white or 20% black; No. ... The Ringlemann charts or cards are made by ruling lines at regular intervals; the higher the number of the card the thicker and closer are ... to what extent the stack is given to emitting smoke, and whether the effluent from the stack changes very rapidly in color from time to time. ... (1) A stack-minute corresponds to watching the stack under scrutiny for one minute.
|Title||:||Highway Engineer and Contractor. ...|