Happy Birthday Robert Bunsen

Robert Bunsen, born March 31, 1811 was a German chemist known for perfecting the burner which bears his name.  While developing the field of emission spectroscopy, he co-discovered the elements cesium and rubidium along with Gustav Kirchhoff.


Test Tube Science: Test Tubesicles

   -Five test tubes
   -Five barbecue skewers
   -50 mL of juice

These are fun to have on a warm afternoon.

 Balance test tubes carefully in rack.  Fill carefully with juice.  Place in freezer for 20 minutes.  Using barbecue skewers or skinny popsicle sticks, place them upright in slushy mixture.  Freeze until firm.  Remove by running test tube very briefly under warm water.


Happy Birthday Joseph Priestley

Joseph Priestley, born March 13, 1733, was an English natural philosopher known for his discovery of oxygen.  As an avid supporter of the phlogiston theory, he called oxygen “dephlogisticated air” and fought against Lavoisier's characterization of it as an element.