15. This curve is of the same general kind as that of the single errors;
16. Equally symmetrical,
17, 18. And more heaped up towards the centre.
19, 20. Algebraic generalization of the foregoing results.
[II. The inverse problem:—given but a few of the errors to determine their centre and law, and thence to draw the above deductions. §§ 21–25.]
22, 23. The actual calculations are the same as before,
24. With the extra demand that we must determine how probable are the results.
25. Summary.
[III. Consideration of the same questions as applied to certain peculiar laws of error. §§ 26–37.]
26. (i) All errors equally probable.