Leveled Readings / Isaac Newton: The Mathematical Principles of Natural Philosophy, excerpts (1687)
Isaac Newton: The Mathematical Principles of Natural Philosophy, excerpts (1687)
Isaac Newton, Principia, Rule I of Reasoning (1687)
These are adaptations, not the original. The original wording is always shown first. Each adapted version restates the same passage at about a grade 4, grade 7, or grade 10 reading level without adding or removing ideas. Quote the original in student writing.
Original wording
“We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.”
Adapted · about grade 4
We should only use causes that are true and enough to explain what we see in nature.
Adapted · about grade 7
We should accept no more causes of natural things than are true and enough to explain what we observe.
Adapted · about grade 10
We are to admit no more causes of natural things than are both true and sufficient to explain their appearances.
Used in: How did the new science challenge older authorities?