$29.99

Barograph Or CLOCK key by Fattorini & sons Bradford England

$53.87

Traditional Geometry Set in wooden presentation box, dated late 1800s.

$75

Friez Anemometer Porcelain Dial Wind Velocity Baltimore MD Belfort Observatory

$107.72

Very Rare Vintage AGL Ltd. #78 Glass Tube Analogue Micro & Milli Ammeter

$99.95

Antique American Moistening Co. Boston MA, Standard Wet bulb /Dry Hydrometer

$25

1893 WC JOHNSON PORTABLE STEAM ENGINES MILL FITCHBURG TOWNSEND MA SIGNED

$35

Antique Oak Hoyt Electrical Instrument Working Voltmeter

$35

Laetia ternstroemioides Microscope Slide

$225

Antique WESTON ELECTRICAL INSTRUMENT Co Large Volts Gauge NEWARK NJ USA

$9.43

Antique glass Microscope slide Lichen Section sample #82

$30

Collection of 8 Verbenaceae (Verbena) Family Pollen Microscope Slides

$91.58

Antique Medical Apothecary Hanging Scales – Precision Balance, Collector Piece