Noting temperature,measure 25 ml sample into distillation flask; with 100 ml H2O, nearly 100 ml, dilute to volume at same temperature, and determine immersion refractometer reading.Obtain corresponding % alcohol from 908.01(see Appendix C).
When volume measurements are made at temperature other than 15.56 , multiply % alcohol from 908.01 (see Appendix C) by appropriate factor from Table 959.04.