A couple of months ago I discovered the Tempo Glass Storm Drop, a Japanese made meteorological device originally used by 19th century sailors to predict and forecast the weather. Although its accuracy can't be completely guaranteed, it certainly makes for a beautiful and interesting object to have! The glasses contain a mixture of potassium, sodium nitrate, ethanol, camphor, distilled water and ammonium chloride and work based on pressure, which is how they have come to be used as a way to forecast storms at sea.
The appearance of the liquid transforming from clear to cloudy to crystal flakes predict whether the weather will be clear, cloudy or filled with thunderstorms. I bought one for my Grandpa for his birthday (which came all the way from Japan!) it seems to actually work! Well to a certain extent! And it makes the most beautiful and interesting formations and patterns. The booklet that came with the glass was in Japanese so I made a little gatefold booklet to go in the box with it, explaining what it does, below are some of the pictures of what I have made.
