A report is made by Meyer in 1889 of an investigation in which he and one other observer attempted to develop ab solute pitch memories through practice. They worked two months using the notes produced by sixteen tuning forks varying from 100 V. d. to 4000 v. d., and four months using from ten to thirty-nine notes produced on the piano. More than half their judgments were correct and the size of the errors was very small. After discontinuing practice for several years Meyer found they had lost the greater part of what they had acquired.