[Illustration: EXHIBIT 3.] Visiting the fellow at the distant end of the line, we find conditions widely at variance from those already considered. Exhibit 2 tells a new story. The recording gauge was placed in service at 4 P. M. (_E_), and shortly afterward (_A_), the pressure began to fall. The jets grew dimmer and dimmer, while the Welsbach mantles became petticoats of red, with hems of white at the bottom. No wonder this man complains of ‘poor’ gas, while some learned friend, dropping in for an evening cigar, explains that there is ‘air in the pipes.’ The one consolatory reflection is that, at all events, the poor fellow had a good light to undress by (_B_ to _C_). [Illustration: EXHIBIT 4.] Exhibits 3 and 4 come from my own residence. Together they form a ‘before-taking’ and ‘after-taking’ advertisement--not of medicine, but of a gas governor. The fact that I am located at a considerable distance--several miles--from the works, and am supplied through a main laid a number of years ago, when the territory was sparsely settled, enables me to present Exhibit 3. Comment on this record is unnecessary. After securing this diagram I installed a governor and set it at eleven tenths. Exhibit 4 shows what happened. I am now doing for myself, and at my own expense, that which the gas company fails to do for me. This governor, therefore, renders me almost entirely independent of the gas company; and, in order to demonstrate more clearly to what degree this independence extends, the gauge has been allowed to run for forty-eight hours without changing the card, thus super-imposing the record of the second day upon that of the first. Note how closely the readings for the two days agree. The governor is a protection against excess of pressure only; if the street pressure falls below eleven tenths--the point at which my governor is set--automatic regulation ceases, and my gas simply becomes subject to practically the same variations as exist on the main. Happily, the latter condition is infrequently realized in our neighborhood. No argument is needed to prove how successfully a governing device of this nature can cope with the trouble indicated by Exhibit 1, or how utterly inadequate it is to afford relief from the evil depicted in Exhibit 2. Increased pressure is the only remedy for the latter.