Front:
POSTCARD HYGROSCOPE
WEATHER INDICATOR
* Works best when placed near
open window so that it is
exposed to outdoor air. Color
of fuzzy area forçasts weather:
BLUE . . .. . FAIR
PINK.. .... HUMID OR RAIN
PURPLE . .. CHANGE
Back:
MESSAGE HERE
© Shackman, N.Y. 10001 No.1711 S
