If a correction is made, a line should be drawn through the incorrect value and the correct one written beside it. Pages should not be torn out. Crucial to the usefulness of any data notebook is the faithful recording of observations and results. There are no wrong results or experiments that did not work. There are unexpected results, flaws in experimental design, errors in procedure, faulty techniques and instrumental failures, but for an intelligent researcher, there is something to be learned from every experiment or exercise.
Reproducibility is also a seminal factor to excellence in research.
Notebook Format Entries must be legible and neat. Some logical order should also prevail. Some investigators use every page of the notebook for the sections outlined below. Others use the right-hand page for the various sections and the left for computations, short notes, ideas for further work, etc. Whichever you choose, be sure to leave a few pages at the front for a Table of Contents and room within each lab write-up and between labs for later annotation.