RECOMMENDED READING . . .  
WATER CLARIFICATION PROCESSES
Practical Design and Evaluation
By Herbert E. Hudson, Jr.
Water & Air Research, Inc., Gainesville, FL

Published in 1981 by Van Nostrand Reinhold Company

Jar Testing and Utilization of Jar Test Data, Chapter 3:  
Velocity Gradients, Chapter 4:

WATER QUALITY and TREATMENT
A Handbook of Community Water Supplies

Published by American Water Works Association, Denver, CO.

Information about JAR TESTS and G-VALUES.  Check Index.

WATER and WASTEWATER TECHNOLOGY
By Mark J. Hammer and Mark J. Hammer, Jr.

Published in 1996 by Prentice-Hall

A discussion about JAR TESTING.
THEORY and PRACTICE of WATER and WASTEWATER TREATMENT
By Ronald L. Droste

Published in 1997 by John Wiley & Sons

JAR TEST, VELOCITY GRADIENT and G-VALUE topics.

ENHANCED COAGULATION and ENHANCED PRECIPITATIVE SOFTENING GUIDANCE MANUAL
EPA 815-R-99-012

Published in May, 1999 by United States Environmental Protection Agency, Office of Water

Chapter 3 sets forth a JAR TESTING PROTOCOL.

Available online at www.epa.gov/safewater/mdbp/coaguide.pdf