Monthly Archives: September 2015



Potion (Thomas Durka) 2
The storm glass was one type of barometer used by Admiral Fitzroy of the HMS Beagle (of Darwin Expedition fame). Changes in atmospheric conditions affect chemical equilibrium inside the glass, causing crystals to precipitate and vanish. While the device isn’t as reliable as Doppler radar when it comes to predicting […]

Storm Glass Barometer Pendant Instructions


The glow treatment on this quartz crystal is invisible under normal light.
You can make any clear or translucent crystal glow in the dark! Here’s how I made a genuine quartz crystal glow. You can apply this method to make other natural gemstones, glass, or plastic items glow. If you’d rather grow crystals that glow in the dark, try my glowing alum […]

How To Make Glow in the Dark Crystals




Lasers 1
Here is a useful table of common physical constants. These physical constants appear time and again in chemistry and physics homework problems. Why memorize them when you can just look them up? I personally prefer to keep a sheet with these constants stuffed in the back of my textbook. You […]

Table of Common Physical Constants


Denatonium Benzoate or Bitrex Chemical Structure 1
Question: What is the most bitter chemical compound? Answer: The most bitter chemical compound is commonly believed to be N-[(2-[2,6-Dimethylphenyl)amino]-2-oxoethyl]-N,N-diethylbenzenemethanaminium benzoate [3734-33-6]. Fortunately, no one goes around using that name. It’s usually called Bitrex or Denatonium Benzoate. You’ll find it added to toxic liquids to deter people and pets from drinking […]

What Is the Most Bitter Chemical Compound?