- prediction of, 544;
- theory, 611;
- on acids, 667
- Law, 3;
- of simplicity, 33, 72, 161;
- commutativeness, 35, 160;
- disjunctive relation, 71;
- unity, 72, 157, 162;
- identity, 74;
- contradiction, 74, 82;
- duality, 73, 74, 81, 97, 169;
- homogeneity, 159;
- error, 374;
- continuity, 615;
- of Boyle, 619;
- natural, 737.
- Laws, of thought, 6;
- empirical mathematical, 487;
- of motion, 617;
- of botanical nomenclature, 727;
- natural hierarchy of, 742.
- Least squares, method of, 386, 393.
- Legendre, on geometry, 275;
- rejection of observations, 391;
- method of least squares, 377.
- Leibnitz, 154, 163;
- on substitution, 21;
- propositions, 42;
- blunder in probability, 213;
- on Newton, 515;
- continuity, 618.
- Leslie, differential thermometer, 345;
- radiating power, 425;
- on affectation of accuracy, 482.
- Letters, combinations of, 193.
- Leverrier, on solar parallax, 562.
- Lewis, Sir G. C., on time, 307.
- Life is change, 173.
- Light, intensity of, 296;
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