Laboratory 
To dream that you are in a laboratory implies that you are trying to discover your spirituality and explore your emotions and characteristics. You may be facing a major change in your life.
Beaker
If you're involved in a field of science or work in a laboratory, a beaker means you're focused and passionate about your work, study or scientific endeavors. Your mind is simply mirroring and reflecting in your dream, either out of habit or because you truly enjoy the stuff you are doing.
If you have no relation to any aforementioned type careers, try to remember what the beaker contained. Is it something good or bad? If it contained (you were concocting) something good, it may be a symbol of something positive and productive brewing in your life. If it is of something bad, you may be searching for a way to unload unwanted things or possibly leave someone in your life.
Bunsen Burner
Dreaming of a Bunsen burner symbolizes scientific or technical tendencies, including setting out to discover something and finding out how it works. It could also very well be related to a person. Consider a Bunsen burner like a tool in which your subconscious is showing that you are experimenting and investigating at the same time about something.
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