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.
PURPLE
. HUMID OR RAIN
CHANGE
Back:
MESSAGE HERE
© Shackman, N.Y. 10001 No.1711 S
