An improved form of mercury manometer
F. Akerboom, H.H. van Mal · Journal of Physics E Scientific Instruments · 1968
A description is given of a form of mercury manometer which has the measurement arms in line with each other, has a very rigid construction and yet a loss in working range of only 3·5 cm. Where a cathetometer is used and where a large number of accurate readings must be made, such an instrument can save time and effort and can diminish sources of error.