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As depicted in this flowchart, the scientific method consists of making observations, formulating hypotheses, and designing experiments. A scientist may enter the cycle at any point.
— LibreTexts Chemistry, Map: General Chemistry: Principles, Patterns, and Applications (Averill), 1: Introduction to Chemistry, 1.3: The Scientific Method

July 5, 2011: Substitution cipher and door-stoppers.

I worked on a simple substitution cipher. I'll work some more on it, and maybe make a little game out of it.

I also finished those door-stoppers!

Edgar Allan Poe Collected Stories and Poems
Asimov's New Guide to Science
Sherlock Holmes: Short Stories

And I read three novels:

Airframe
Shadow Puppets
Shadow of the Giant