Original vintage optical industry trade magazine ad for JAMES G BIDDLE SCIENTIFIC INSTRUMENTS. Main office and factory was located in Philadelphia, PA. High Vacuum Pumps. The Condensation Pump developed by Dr. Irving Langmuir of the General Electric Company. Picture shows a complete outfit comprising Langmuir Condensation Pump, two-stage auxiliary pump and 1/2 HP motor all mounted together on one base. Old 1923 optical and medical laboratory equipment advertisement.
james g biddle 1923 high vacuum pumps irving langmuir vintage ad
- Product Code: s290
- Length: 9 inches
- Width: 6 inches
- Pages: 1
- Views: 5
- Availability: In Stock
- $20.00
$15.00
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