This document outlines 10 rules for drawing clear scientific diagrams. It states that scientific diagrams are used in lab reports to show experimental setups and need to be easy to understand. The rules include using a sharp pencil, ruler for straight lines, single firm lines, simple 2D representations, labeling equipment with straight lines, drawing equipment in correct proportions, showing touching equipment actually touching, and using available space efficiently. Following these rules helps ensure diagrams can be understood by other scientists.