Simply stamped JD. Bullseye condensers contain a convexed lens that is used to focus and control the light illuminating a subject under a microscope.

 

THIS IS A VICTORIAN CASED POCKET BAROMETER ,THERMOMETER,COMPASS IN LID OF CASE BY CW DIXEY OPTICIAN TO THE QUEEN NEW BOND ST LONDON,THE DIAL MEASURES APROX 45MM,IT IS WORKING FINE, THERE IS SOME MINOR

 

Up for Bid Antique General Electric "THOMSON" AC Voltmeter. Seems to be Working, but Appears to Read a Little High. Interesting Old Electrical Testing Device. Thanks for Looking

 

Up for auction is this "Proof and Tralles Tp. 60 degrees F." Hydrometer, made in USA, Estate sale find. I have no idea how these work or how old this one is. Comes in the original box with the test tu

 

This is not my expert subject so I cannot state whether this Instrument is complete and intact ? It is in very good and clean condition ! This item came in with a huge Box of Medical Instruments etc

 

Apothecary Jar Serpasil Jean Robbinette hand painted Smoke free home

 

Please note: We ship Worldwide. But If you're bidding from outside the mainland UK or overseas please ask for a quote for shipping before bidding. A good quality, stylish 19th c. Watson FRAM microscop

 

VINTAGE JOULE METER by GRIFFIN & GEORGE 12V ac not mains Condition: Excellent, Overall height: 9 inches

 

6 Antique Brass Apothecary Scale Weights Scruples & Drachms Troemner Phila 1800s Description: This is one lot of six antique brass H. Troemner apothecary scale weights dating, I would guess, to th

 

An early 20th century antique apothecary/chemist's earthenware medicine measure with black transfer printing 1 DR. / TO LOWER RIM / (A TEASPOONFUL). The base is impressed " 1 dr " . WEIGHT: 25 gms (un