This is the most important part of the report and must be carefully written.
Explain the meaning of your results and interpret your graphs. The Laboratory Sheets have supplementary questions which should be answered under this heading. You should structure you discussion with separate sub-headings to answer each question in turn. Consider the accuracy of the results. How do they compare with published data, where available? You should explain why your results deviate from those published. Can you relate your results to the observations?
This should be a succinct summary of the main findings of the investigation. Do not include new material in a conclusion.