This handbook is made up of 168 pages.
 
This handbook presents the total sum of all achievements that were made by AOSA and ISTA under the lead of Samuel Raymond Miles. It presents in the first part a multitude of tolerance tables for testing results for significance of purity, foreign seed, germination, pure-live seed and trueness to cultivar determinations. A glossary introduces to this part and the different test situations are explained. The tolerance tables contained in the ISTA Rules are directly taken from this collection of tables. In the second part of the handbook the calculation of the tolerances is demonstrated in a very clear way providing a deeper insight into understanding the application of statistics to the evaluation of seed testing results.