A meniscus, so called from its resembling the crescent moon.
Sometimes, as in the Ornithorhynchus, the meniscus is absent.
In order to obtain an accurate result, the meniscus should be removed.
With most instruments the reading is taken from the bottom of the meniscus.
The height of the meniscus is then read on a millimetre scale attached to the capillary.
The temperature ...