# Stack loss data¶

## Description¶

The stack loss plant data of Brownlee (1965) contains 21 days of measurements from a plant’s oxidation of ammonia to nitric acid. The nitric oxide pollutants are captured in an absorption tower.

## Notes¶

Number of Observations - 21

Number of Variables - 4

Variable name definitions::

STACKLOSS - 10 times the percentage of ammonia going into the plant
that escapes from the absoroption column
AIRFLOW   - Rate of operation of the plant
WATERTEMP - Cooling water temperature in the absorption tower
ACIDCONC  - Acid concentration of circulating acid minus 50 times 10.


## Source¶

Brownlee, K. A. (1965), “Statistical Theory and Methodology in Science and Engineering”, 2nd edition, New York:Wiley.