Antique Humidity Percentage Scale by J. Casartelli & Son, Manchester. Used to calculate the relative humidity when wet and dry bulb temperatures are known. Drum inside box rotates to display the RH. Brass and wood construction. English, circa 1870's.
Measures approx 7" long by 1.75" wide by 1.5" high. Missing knob at bottom, otherwise fine condition.
Product Reviews for J. Casartelli & Son Humidity Scale
Questions? Call us Toll Free 1-800-646-1203 for friendly, expert advice.
The Weather Store 146
Main Street. Sandwich, MA 02563 Tel.:1-800-646-1203 Fax: 1-508-888-6398 E-mail:pmadden@theweatherstore.com Open: Showroom by Chance or Appointment only