What Is a Weatherometer?

Storm Glass is a possible weather forecasting tool. A closed glass container is filled with a transparent solution composed of several chemicals. Depending on the outside temperature, different types of crystals will appear in the bottle. The test did not clearly indicate the weather ability, and it tended to be an ornament ^[1] .

Weather forecast bottle

Storm Glass ( Storm Glass ) is a

The change of crystallization in the bottle is mainly due to the

During that historic voyage, Fitzroy recorded the weather forecast of the storm bottle: if the liquid is clear, the weather will be fine; if the liquid is hazy, and sometimes accompanied by precipitation, then the weather It will also be cloudy like a solution; if there is a suspension of precipitation in the solution, it indicates a wet weather or frost; if the suspended precipitation and the hazy liquid coexist, the storm is coming; if there is precipitation in the liquid on a sunny winter day Suspended, it means that it is going to snow; if there is large precipitation in the liquid on warm days or snowy winter, it means it will be cloudy; if crystals are precipitated on the bottom of the cup, it means that it is going to frost; if it is A spiral pattern on the top indicates wind.

Weather forecast bottle material

2.5g potassium nitrate, 2.5g ammonium chloride, 33ml distilled water, 40ml ethanol, 10g camphor

Weather forecast bottle process

The first step is to take 10g camphor (note that it must be natural camphor)

The second step, anhydrous ethanol 40mL

The third step is to take 5g of potassium nitrate and ammonium chloride. 33mL of distilled water

Step 4.Pour the ammonium chloride potassium nitrate solution into the designated container

Step 5: Pour the camphor ethanol solution and mix thoroughly

The sixth step is to heat the distilled water, dissolve potassium nitrate and ammonium chloride, add ethanol, and then add camphor, and place the solution in a test tube with a cork.

Weather forecast bottle precautions

Mark Ford, who has been making storm bottles for many years, sent me an email saying that even if it is very pure artificial camphor, there will be more or less borneol impurities in the production process. Experience tells him that the effect of natural camphor is better than that of artificial camphor, and it may be related to impurities in artificial camphor.

First prepare an aqueous solution of potassium nitrate and ammonium chloride, and an ethanol solution of camphor. After that, slowly mix the two solutions (it is better to pour the aqueous solution into the ethanol solution). This also helps to fully dissolve the solutes. Mr. Ford never used a cork to seal, but instead sealed the solution directly in a small test tube.