The Making of the Glencairn Methuselah Window: Page 52

Made from Jan 18 to March 22 1928

1 quart ordinary turpentine put in a bowl covered with a cloth to keep out dust and stirred morning 100 times, noon 100 times, quitting time 100 times, 200 on Saturdays or over 13000 times

2nd lot made from March 27 to May 12, 1928
as the weather was warmer I think about the same result was obtained in a shorter time. It looked about the same strength as the first batch, stirred about 11000 times.