Some persons who record examinations prefer to use numerals to indicate the size of the organs. We describe the organs in seven degrees of power, and to indicate those degrees, employ the written figures, 1, 2, 3, 4, 5, 6, 7. When thus used, 1 means VERY SMALL; 2, SMALL; 3, MODERATE; 4, AVERAGE; 5, FULL; 6, LARGE; 7, VERY LARGE. The signs +, --, [symbol], [symbol], mean the same as in the above table. THE SELF-INSTRUCTOR. SECTION I. PHYSIOLOGICAL CONDITIONS AS AFFECTING AND INDICATING CHARACTER. I.--VALUE OF SELF-KNOWLEDGE. "KNOWLEDGE is power"--to accomplish, to enjoy--and these are the only ends for which man was created. ALL knowledge confers this power. Thus, how incalculably, and in how many ways, have recent discoveries in chemistry enhanced human happiness, of which the lucifer match furnishes a _home_ example. Increasing knowledge in agriculture is doubling the means of human sustenance. How immeasurably have modern mechanical improvements multiplied, and cheapened all the comforts of life. How greatly have steamboats and railroads added to the former stock of human success and pleasures. Similar remarks apply to all other kinds of knowledge, and as it increases from age to age will it proportionally multiply all forms of human happiness. In fact, its inherent _nature_ and legitimate effect is to promote every species of enjoyment and success. Other things being equal, those who know most, by a law of things, can both accomplish and enjoy most; while ignorance instead of being bliss, is the greatest cause of human weakness, wickedness, and woe. Hence, to ENLIGHTEN man, is _the_ way to reform and perfect him.