Excerpt: "Indeed, in all sciences the grand difficulty has been to ascertain facts-a difficulty which, in the science of education, peculiar circumstances conspire to increase. Here the objects of every experiment are so interesting that we cannot hold our minds indifferent to the result. Nor is it to be expected that many registers of experiments, successful and unsuccessful, should be kept, much less should be published, when we consider that the combined powers of affection and vanity, of partiality to his child and to his theory, will act upon the mind of a parent, in opposition to the abstract love of justice, and the general desire to increase the wisdom and happiness of mankind. Notwithstanding these difficulties, an attempt to keep such a register has actually been made. The design has from time to time been pursued. Though much has not been collected, every circumstance and conversation that have been preserved are faithfully and accurately related, and these notes have been of great advantage to the writer of the following stories."
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