The Making of the Glencairn Methuselah Window: Page 06

MATUSALE Tracing medium
copied from record of Sep 28 1927

MIX THE PAINT WITH THE THICKER OXIDIZED TURPENTINE UNTIL THE MASS IS WELL SATURATED BUT NOT SHINY - DILUTE WITH 10 DAY-STIRRED 3 TIMES A DAY IN WARM WEATHER-TURPENTINE – THIS WILL WORK NICELY AND WILL DRY REASONABLY SOON

AFTER THE TRACING HAD DRIED AN HOUR OR TWO I PUT A FILM OVER PARTS WITH A TRACING BRUSH AND A GOOD DEAL OF THE FATTER OIL