The meniscus. Make sure to always measure at that point. If your graduated cylinder/pipet/etc has the meniscus at 10 mL then the glassware has 10 mL in it.
The lowest part. The highest part is hard to determine. At the bottom, ie the lowest point.
The meniscus is a curve in the surface of a liquid that is caused by surface tension and by the attraction between the liquid and the sides of the container. The bottom of the meniscus represents the most accurate measurement because the lines of a graduated cylinder are in the middle of the graduated cylinder.
As a chemist I can tell you that there are a significant purpose differences between the two, though sometime masked in high school chemistry. In college you learn that the graduated cylinder are more specifically designed to measure volume of a liquid. The test tube is glass which is safer to do most chemical reactions in - meaning the test tube is not generally used for measurement but rather a container for liquids.
The meniscus of a liquid is read at the bottom of the curve that forms at the liquid's surface in a graduated cylinder or a similar container. To determine the volume of the liquid accurately, it is important to read the measurement at the lowest point of the meniscus.
When measuring the volume of a liquid in a graduated cylinder, you read it at eye-level and at the bottom of the curve of the meniscus. This is true for water and aqueous solutions. Some "non-water" liquids do not form a meniscus in a glass cylinder. Also, water does not form a meniscus in a plastic cylinder.
On the top
On the top
The lowest part. The highest part is hard to determine. At the bottom, ie the lowest point.
It's called Ya Mum's Panis
The meniscus is a curve in the surface of a liquid that is caused by surface tension and by the attraction between the liquid and the sides of the container. The bottom of the meniscus represents the most accurate measurement because the lines of a graduated cylinder are in the middle of the graduated cylinder.
When measuring volume in a graduated cylinder, you should read the level at the bottom of the meniscus, which is the curved surface of the liquid. Make sure your eye is level with the meniscus to avoid parallax error. The measurement should be taken at the lowest point of the curve for an accurate reading.
When reading the meniscus in a graduated cylinder, you should ensure your eye level is parallel to the liquid level. The bottom of the curve of the liquid surface is the correct level to record. The meniscus is the curved surface due to water molecules sticking to the cylinder walls. Take the reading at the lowest point of the curve.
at the bottom of the meniscus
use a graduated cylinder with the lowest capacity (greater than 26ml) if extreme accuracy is needed, (as I suspect with the small amount stated) I might use a scale, measuring by weight instead of volume (dropper may be needed to add to weight needed).... but you must adjust weight according to specific gravity or the only accurate liquid measured by 25.3 grams weight would be WATER :P
The most accurate way to read a graduated cylinder is to place it on a flat surface. Bend down so you are eye level with the Meniscus Line, the line that is formed by the border between the unfilled portion of the cylinder and the top of the liquid. The very lowest part of this line is where you read the measurement. The markings are in whole numbers, 1, 2, 3, etc., with 10 lines between each number.
you carefully poor the water into a graduated cylinder and meassure at the lowest point of the meniscus.
When a liquid is filled in a cylinder, the liquids usually form a bubble called meniscus. Then you measure the lowest point of the meniscus and record the measurement.