DEDUCTIONS.

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have forty pounds, because I have previously learntby induction that twenty and twenty make forty.

(66.) Imperfect deductions may be divided intoseveral departments, for every deduction is imper-fect in which the law which is sought to be appliedis not absolute. From this cause it follows, that adeduction from a probable induction, or hypothe-tical induction, or an induction of means and limitswhen applied to any particular instance, is neces-sarily incomplete and unsatisfactory.

(67.) As an example of an imperfect deductior,I will assume as a law, that amongst great massesof children, half are boys half are girls. From thislaw it follows deductively, that of one thousandchildren we should probably have live hundred ofeach sex, but it by no means follows that out often children we should have five of each, for itmight happen that the boys and girls are groupedtogether in masses of each, and, therefore, the lawwould not apply to very small numbers.