Post by 1dave on Sept 5, 2020 20:56:57 GMT -7
Interested in how crystals form?
EVERYONE told me they take millions of years to grow.
As a child I watched snowflakes form in seconds. "EVERYONE" doesn't know what he is talking about.
One of the interesting things I found out about was the Admiral Fitzroy Storm glass used on his weather experiments with Charles Darwin on the HMS Beagle voyage.
EDIT: You can easily buy them on line for $10-15.
It is interesting to watch the crystals form on a hot day, and what happens when you shake the glass.
I have no idea what a threshing boat would do to it.
EVERYONE told me they take millions of years to grow.
As a child I watched snowflakes form in seconds. "EVERYONE" doesn't know what he is talking about.
One of the interesting things I found out about was the Admiral Fitzroy Storm glass used on his weather experiments with Charles Darwin on the HMS Beagle voyage.
EDIT: You can easily buy them on line for $10-15.
Ingredients for the Storm Glass
* 2.5 g potassium nitrate
* 2.5 g ammonium chloride
* 33 ml distilled water
* 40 ml ethanol
* 10 g camphor
Warm the water and dissolve the potassium nitrate and ammonium chloride; add the ethanol; add the camphor. Place in corked test tube.
During the historic voyage, FitzRoy carefully documented how the storm glass would predict the weather:
If the liquid in the glass is clear, the weather will be bright and clear.
If the liquid is cloudy, the weather will be cloudy as well, perhaps with precipitation.
If there are small dots in the liquid, humid or foggy weather can be expected.
A cloudy glass with small stars indicates thunderstorms.
If the liquid contains small stars on sunny winter days, then snow is coming.
If there are large flakes throughout the liquid, it will be overcast in temperate seasons or snowy in the winter.
If there are crystals at the bottom, this indicates frost.
If there are threads near the top, it will be windy.
A storm glass works on the premise that temperature and pressure affect solubility, sometimes resulting in clear liquid; other times causing precipitants to form. However, the method by which this works is not fully understood. Although it is well-established that temperature affects solubility, some studies [which?] have simultaneously observed several different storm glasses forming similar crystal patterns at different temperatures. In addition, sealed glasses are not exposed to atmospheric pressure changes and do not react to the pressure variations associated with weather systems. Some people [who?] have proposed that surface interactions between the glass wall of the storm glass and the liquid contents account for the crystals. Explanations sometimes include effects of electricity or quantum tunneling across the glass.[2]
* 2.5 g potassium nitrate
* 2.5 g ammonium chloride
* 33 ml distilled water
* 40 ml ethanol
* 10 g camphor
Warm the water and dissolve the potassium nitrate and ammonium chloride; add the ethanol; add the camphor. Place in corked test tube.
During the historic voyage, FitzRoy carefully documented how the storm glass would predict the weather:
If the liquid in the glass is clear, the weather will be bright and clear.
If the liquid is cloudy, the weather will be cloudy as well, perhaps with precipitation.
If there are small dots in the liquid, humid or foggy weather can be expected.
A cloudy glass with small stars indicates thunderstorms.
If the liquid contains small stars on sunny winter days, then snow is coming.
If there are large flakes throughout the liquid, it will be overcast in temperate seasons or snowy in the winter.
If there are crystals at the bottom, this indicates frost.
If there are threads near the top, it will be windy.
A storm glass works on the premise that temperature and pressure affect solubility, sometimes resulting in clear liquid; other times causing precipitants to form. However, the method by which this works is not fully understood. Although it is well-established that temperature affects solubility, some studies [which?] have simultaneously observed several different storm glasses forming similar crystal patterns at different temperatures. In addition, sealed glasses are not exposed to atmospheric pressure changes and do not react to the pressure variations associated with weather systems. Some people [who?] have proposed that surface interactions between the glass wall of the storm glass and the liquid contents account for the crystals. Explanations sometimes include effects of electricity or quantum tunneling across the glass.[2]
It is interesting to watch the crystals form on a hot day, and what happens when you shake the glass.
I have no idea what a threshing boat would do to it.