The rule for the parent or teacher in mastering these exercises is the same in all; it consists simply in forming the question in such a manner, as that the word, the clause, or the whole proposition, shall be required to make the answer. Sufficient explanation and examples of all this will be found in the Note.[13]

The uniform results of many experiments, have established the importance of this exercise as an instrument in communicating knowledge to the ignorant, whether young or old. We shall shortly advert to a few of the circumstances connected with these experiments, for the purpose of satisfactorily establishing this.

In an experiment made in May 1828, under the direction of the Very Rev. Dr Baird, Principal of the University of Edinburgh, before the Lord Provost, and several of the Professors and Clergymen of that city, nine adult criminals, "taken without regard to their abilities," and who, in the opinion of Governor Rose, "formed a fair average of the usual prisoners," were, in the space of three successive weeks, exercised in whole for eighteen or twenty hours. They were at the end of that time minutely examined in the Chapel of the County Jail, in the presence of the Right Honourable and Reverend Professors and Gentlemen, who formed Principal Baird's committee; and their Report of the experiment and its effects bears, that "the result of this important experiment was, in every point, satisfactory. Not only had much religious knowledge been acquired by the pupils, and that of the most substantial, and certainly the least evanescent kind; but it appeared to have been acquired with ease, and even with satisfaction—a circumstance of material importance in every case, but especially in that of adult prisoners." "The examination evidently brought out only a specimen of their knowledge, and did by no means comprise all that had been acquired by them; but, even though it had constituted the whole amount of their information, the fact that such a treasure had been amassed in three weeks is in itself astonishing. The writer of this Minute was not acquainted with the extent of their acquirements when Mr Gall commenced his operations; but judging from the examination, and from his knowledge of the contents of the books taught, he has no hesitation in averring, that the answers which they gave, arose entirely from information communicated by them. And when he reflects that their answers, being clothed in their own words, guaranteed the fact, that it was the ideas upon which they had seized, and that their knowledge participated in no degree of rote, the conviction to his mind is irresistible, that the universal application of the Lesson System to Prison Discipline, and to adults every where, would be followed by effects incalculably precious to the individuals themselves, and to the improving of society in general."

The efficiency of this exercise in communicating knowledge, was equally conspicuous in another experiment, conducted under the eye of the Principal, Professors, and Clergymen of Aberdeen, in July 1828. The persons on whom this experiment was made, were children taken from the lower classes of society, carefully selected on two several days, by a committee of clergymen appointed for the purpose, from the various schools in the city. These children were all carefully and individually examined in private by the committee, and were chosen from among their companions, not on account of their natural abilities, or educational acquirements, but specially and simply on account of their ignorance. The precautions taken by the Rev. and learned examinators, to secure accuracy in their ultimate decision, were at once judicious and complete; and were intended to enable them to say with confidence at the close of the experiment, that the results, whatever they might be, were really the effects of the exercise and discipline to which the children during it had been subjected, and were in no respect due to the previous capacity or the attainments of the children.

To secure this important preliminary object, therefore, the sub-committee of clergymen above alluded to was appointed, as soon as the experiment was determined upon, with instructions to collect a class of the most ignorant children they could find, attending the several schools, and who it was thought would be, of course, most incapacitated for receiving instruction. This sub-committee, consisting of the Rev. John Murray, the Rev. Abercromby L. Gordon, and the Rev. David Simpson, in their previous Report, say, "We, on two several days, met with the children which were collected from the various schools, and examined them individually, and apart from each other; avoiding every appearance of formality, and endeavouring to draw them into familiar conversation, that we might correctly ascertain the state of their religious knowledge on the three following points, which we considered to be the best criterion by which to judge of their understanding of the other less important points in the gospel scheme of salvation.—These points were, 1. Our connection, as sinners, with Adam; 2. Our connection with Christ as the Saviour; 3. The means by which we become interested in the salvation of Christ. On minutely examining each child on these points, one by one, and endeavouring, by varied and familiar language and cross-questioning, without confusing their ideas, to ascertain the knowledge which they possessed on these first principles, we accurately, and at the time, minuted the result, distinguishing those points which they understood, and those which they did not. From this list we afterwards selected twenty-two names, of children who appeared from the list, to be the most ignorant, by not having any marks of approval on any one of these points on which they were examined;—although delicacy to the children, as well as to their parents and teachers, prevented us from stating to them, that this was the principle by which we had been regulated in our selection. From these twenty-two children, Mr Gall has made up his class of ten, for this experiment, which he proposes shall continue for eight days, occupying two hours each day; and having thus chosen that class of pupils which appeared to us the most ignorant, we have, in justice to Mr Gall and this system of teaching, stated the fact, leaving the examinators to make what allowance they may on this account think proper, in determining on the failure or success of this very important and interesting experiment."

This was the state of the children's knowledge and capacity when the experiment began; and the following was found to be the state of these same children's knowledge when examined publicly in the East Church, before the Very Rev. Principal, Professors, and Clergymen of the city, and a large congregation of the citizens, eight days afterwards.

The children were first interrogated minutely on the doctrines of the gospel, which had been previously arranged in a list under sixteen different heads, embodying all the leading doctrinal points in the Confession of Faith and Shorter Catechism, a copy of which was handed to the Very Rev. Principal Jack, who presided. The Report of the Experiment, prepared by their Committee, goes on to say, that "After being examined generally and satisfactorily on each of these heads, the chairman, by means of a list of the names with which he was furnished, called up some of them individually, who were carefully examined, and shewed, by their answers, that they severally understood the nature of the above doctrines, and their mutual relation to each other.

"They were then examined on the Old Testament History, from the account of the death of Moses, downwards, to that of the revolt of the Ten Tribes in the reign of Rehoboam. Here they distinctly stated and described all the leading circumstances of the narrative comprised in the 'First Step,' whose brief but comprehensive outline they appeared, in various instances, to have filled up at home, by reading in their Bibles the corresponding chapters. They were next examined in the same way, on several sections of the New Testament," with which they had also acquired an extensive practical knowledge, besides some useful information in Civil History, Biography, and Natural Philosophy, on all which they were closely and extensively examined.

In another experiment, undertaken at the request, and under the sanction, of the Sunday School Union of London, the efficiency of this exercise, as a successful imitation of Nature in communicating knowledge, was also satisfactorily ascertained. We shall at present advert only to one feature of it, as being more immediately connected with the present branch of our subject, that of communicating knowledge to the most ignorant and depraved.

The Report of this Experiment, drawn up by the Secretaries of that Institution, records, that "it had been requested, that, if possible, children should be procured, somewhat resembling the heathen, (or persons in a savage state,) whose intellectual and moral attainments were bounded only by their knowledge of natural objects, and whose feelings and obligations were of course regulated principally by coercion and fear of punishment."