first edition Later plain wrappers.
1791 · Flensburg und Leipzig
by Schrader, J - SCIENCE EXPERIMENTS
Flensburg und Leipzig: Korten, 1791. First Edition.. Later plain wrappers.. Very good. . 8vo, 24 pp. + folding plate.
Schrader was a physics prof. at Kiel who was noted for his work in optics. He laments the difficulties inherent in attaining high vacuums and maintaining them. One solution he offers is a newly designed valve to aid mechanical vacuum pumps reach and then maintain higher levels. An interesting invention and solution to a vexing experimental problem. Poggendorff II, 840. (Inventory #: 1799)
Schrader was a physics prof. at Kiel who was noted for his work in optics. He laments the difficulties inherent in attaining high vacuums and maintaining them. One solution he offers is a newly designed valve to aid mechanical vacuum pumps reach and then maintain higher levels. An interesting invention and solution to a vexing experimental problem. Poggendorff II, 840. (Inventory #: 1799)