Graph 1 & 2

From MariachiWiki

Below are Graphs 1 &2. The blue line represents the signal from the top scintillator, the yellow line represents the signal from the bottom scintillator, and the green line is the signal coming from both (coincidence).

Graph 1:

Graph 2:

As you can see from the Voltage vs. Time graphs, the signal from the top scintillator always arrived first. When they were a smaller distance apart from each other, it was slightly hard to tell which signal came first, but when they are farther distance apart, it was easy to see that the ray passed through the top scintillator first. From this experiment, it can be concluded that most cosmic rays come from above.