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Wagnerian harmony at the Apiary ...

Yes, multiply by 0.714 to get OA anh.

0.714 x 3.5% OA dih. = 2.5% OA anh.

Johann

I use mass concentration % [Mass/Volume].


Example 2

ΔV = 292 [g] x 0.605 [mL/g] = 176.66 [mL]

V1:1 = 4000 [g] x 1.63 [mL/g] = 6520 [mL]

volume of the mixture V = V1:1 + ΔV = 6520 +...

Prof. Roger Morse writes very open about Top Bar Hives in his book. I agree with him. Sincerely.
(“The New Complete Guide to Beekeeping”)

No.
Estimating the population of a hive without openinig it is not accurate. It is uncertain and doubtful.
You could try a temperature and acoustic methods.

I use this calibration bloc

https://www.mueller-optronic.com/xtcommerce/product_info.php?language=en&products_id=212&XTCsid=2b71c00ff526325644cb22f0fe3f307a

with the oil of clove as a contact...

Dr. Pedro Rodriguez presented a thymol formula for cords.
One could put this substance in these gaps. Just an idea.

Nowadays, in such cases is a PID Controller with a Pt100 temperature sensor normally used. Not a proportional one. They are cheep. You will get a good temperature stability and accuracy < 0.5 °C.
...

I found this product description:...

I think, it's easy. A small pump sprayer with a flexible poly wand - with angled end - for hard to reach areas.
Sodium carbonate, Na2CO3.
Water.

Peace, Love And Joy On Christmas...

Johann

Spraying the bees on both comb sides with a water solution of oxalic acid dihydrate works very well. Do not wet them. Use a respirator.

You need only one scale - for honey.
You need accuracy - 0.1% or 0.2%
You need a reference plate and contact fluid to calibrate the device.
You do not need a pipette to take so extremely small...

Sodium carbonate.
Sodium carbonate is a food additive (E500).

It can be a manifestation of a heavy Varroa infestation.

Good luck!

It is not a stone. It's a "calibration test plate."
For honey - a glas plate. Its parameter are: 78.8 % Sugar, 1.45839 Refractive Index, or 19.6 % Water.
You need "calibration plate contact...

Bees like them.
More then 31% of the territory of my country is covered by forestry and woodland.
Mountain and wood people will disparage the polystyrene hives very insistently.
They earn their...

It is a trade mark.
This term is used by a queen breeder or merchant in order to designate his or her goods and to distinguish them from those sold by others.
Ask the Buckfast Abbey!

Johann

It sounds simple, but it can induce swarming instead.

The acids concepts always invoke magical ceremonies of drones killing.

Do not overestimate the efficacy of acids against Varroa.

Let's accept the fact that the “observability” of the beehive determinates the beekeeper's ability to control it.
Consequently, he can optimize his operation.
Prior to this, he has to formulate his...

He had not became a pater. I have asked myself what was the reason. Maybe your sentence is the answer ...

If you want to visualize yourself the hole queen rearing process mentally before you start with it you can see a film “Successful Queen Rearing” with charming Marla Spivak:...

You can try the original Nicot website:
http://www.nicotplast.fr/PresentationAnglais/GBPageCadre.htm
Put the copularve in the beehive early in the spring. Don't be afraid.