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no additive
Make up a water level, this consists of a clear plastic tube full of water with one end in a bucket of water Make sure the tube is long enough to cover the whole area of the proposed pool. you will note that the water level in the tube is always the same as that in the bucket and this will give you the reference you need to measure the slope in the land .
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It is used to measure the depth of a small hole in the ground.
no additive
zavior hoxie.
edta- ppt tube
A bubble of air is in a small slightly curved tube of alcohol. The bubble will float at the highest point and indicate level or not level.
light blue
heprin
reflux
Ethylenediaminetetraacetic acid (EDTA)
Because the tube is partly filled with coloured spirit or alcohol so the air bubble is more visible.
Potassium EDTA (ethylenediaminetetraacetic acid)
Non additive red top
none immunology, serology, chemestries