Those two graphs represent the data collected from both periods one and two for the wormost lab. The results were consistently inconsistent. This is due to several factors. For one, students probably had trouble figuring out how to find the pulse and most likely would confuse the pulse with fluids going through the body. Two, the test subjects were live organisms and therefore moved quite often. Three, the worms heart rates were probably accelerated due to the shock of being put under a bright light. Unfortunately,  the results , as displayed on the graph, are similar for all three solutions. As a result, it is difficult to determine which is the depressant,  which is the stimulator,and which is regular whatever. However inferences can be made by the slight differences. If you look at the chart, you will notice that solution A had more populated count towards the bottom. Thus this is probably the depressant.  Solution B had results toward the middle, and is most likely the normal water. Solution C is more towards the top, and is most likely the stimulant. I am not very comfortable with these conclusions, because after a class discussion on Friday and some research,  I realize most were probably counting the fluid move through the body, rather than the heart beat. Nonetheless, I must make due with the data in front of me and use this lab as a learning experience.