In 1737, his festival (duplex) being observed on the 19th of July.
Grubb's duplex micrometer is described in the 9th edition of the Encyclopaedia Britannica.
4-12), who estimates the accuracy attainable with the duplex micrometer as equal to that of the heliometer; but as few measures of permanent value have been made with the instrument, and those made exhibit an accuracy far inferior to that of the heliometer, it is unnecessary to describe the instrument here in greater detail.
The new loft suites are a must, as they resemble a small, chic duplex apartments - very urban !
Comparison of duplex imaging and arteriography in the evaluation of lower limb arteries.