and by exhaustion fill the tube with water from the funnel A; when full, close stop-cock E, and remove flexible tube, which is now placed upon a jet and the gas to be examined is allowed to pass through it for a minute or two. While it is thus passing freely we place it on the tip of the Eudiometer; by opening the stop-cock E the water will flow out and the gas will take its place. By opening the stop-cock D of funnel A the water will be drawn off until the gas fills the tube to the O point, when the stop-cock D of funnel A, also the stop-cock E of tube B are closed.

Now place the funnel C upon the tip, which completes the first part of the operation.

If in our qualitative examination we have found ammonia (NH,) and sulphuretted hydrogen, (SH,) we proceed to determine the per cent. of ammonia (NH3). For that purpose we introduce about half-ounce of dilute sulphuric acid in the funnel C and gradually open the stop-cock E and allow it to flow down the tube, always leaving a little of the liquid in the funnel to prevent the introduction of air. A few minutes will be required for the liquid to subside, and the rise of the water in the tube will indicate the per cent., when we have drawn off the water in funnel A to the same level as the liquid in the tube B; this must always be done at each reading of the different gases.

It is also well to place in funnel C a little pure water to cleanse it after each reagent.

A better solvent for ammonia (NH,) is a solution of nitrate of silver mixed with a solution of arsenious acid in equal quantities; this cannot be used if sulphuretted hydrogen (SH,) be present.

For sulphuretted hydrogen (SH,) we place in the funnel C a solution of arsenious acid, and allow it to flow down, the rise of the water in the tube will indicate the per cent. of this gas. (SH,)

When we find ammonia (NH2) we do not find carbonic acid (CO) and vice versa. So if our qualitative examination shows. carbonic acid (CO2) we commence our quantitative analysis for this gas instead of for ammonia (NH). Its well-known sol

vent is a dilute solution of caustic potassa; about one-half oz. will be sufficient to place in the funnel C; when passed down the tube it causes a rapid absorption, and the rise of water shows the per cent.

For bi-sulphide of carbon (CS,) one-half ounce of solution of iodine in water is placed in funnel C and carefully allowed to flow down. The rise of water gives the per cent. (CS).

We next absorb the illuminating gases, which, in all probabilities, will be a mixture of olefiant gas (C,H,), acetylene (C,H,), per carbide of hydrogen, and the vapor of benzole. These are all acted upon and dissolved by bromine ; to use this very heavy liquid, we first place in funnel C one-half ounce of. water, and for coal gas, two or three drops of bromine (for naphtha gas, ten to fifteen will be required) and very carefully allow the bromine to flow down. It will fill the tube with a red vapor, if we have added enough, and will cause an expansion of the gas in the tube instead of contraction. After a few minutes we place in funnel C one-half ounce of solution of caustic potassa with the vapor already there, and allow it to flow down; this will absorb the red vapor, and the rise of water in the tube will give the per cent. of illuminants.

For air, use one-half ounce of pyrogallate of potassa, and wash down with water; the rise will give per cent. of oxygen, (0) and as oxygen is one-fifth of the air, we say four times the per cent. observed is nitrogen (N) or five times the per cent. observed is air, and so record it.

For carbonic oxide (CO), use half an ounce sub-chloride copper in hydrochloric acid; this absorbs this gas, but before reading the per cent. wash with water, and after the water a little caustic potassa is allowed to flow down; the rise of the water gives the per cent.

The remaining gas in the tube is a mixture of hydrogen (H) and light carburetted hydrogen (CH) plus the nitrogen (N), and will be so recorded. It is seldom necessary to make separation of these gases, for they both serve to dilute and carry the illuminating gases. In coal gas they are about equal in quantity.

This completes our analysis, and if the temperature of the room and all the re-agents used have been the same, and we have been careful not to handle the tube with our warm hands, the readings will be approximately correct.

It is well to have a second tube, as shown, filled the same as the one we use, to note any change of temperature.

It is important that the order here recorded be carefully observed.

CAPT. WHITE-I move that the thanks of the Association be tendered to Mr. Goodwin for the explanation of his apparatus. Carried.

MR. CARTWRIGHT-Mr. President: I now propose the name of Mr. William King, of Liverpool, as an honorary member of this Association.

I have no doubt that if

THE PRESIDENT-Gentlemen: there was time you would wish to speak upon this subject. Mr. King visited this country recently, and a description of his reception in New York is given in the Gas Light Journal. The limited time at our command prevents my speaking of his merits as they deserve.

THE SECRETARY-The Executive Committee have had in consideration the subject of recommending Mr. King as an honorary member, and they now nominate him as such.

THE PRESIDENT-I have received notice from the Executive Committee that they have proposed the name of Mr. William King, of Liverpool, as an honorary member of this Association, and it is moved and seconded that the Secretary be authorized to cast the ballot of the Association to that effect.

The motion was carried, and the President appointed Mr. White as teller to receive the ballot, who announced the unanimous vote of the Association in favor of the election of Mr. King.

Upon motion, Mr. Slater was asked to explain a diagram showing the consumption of gas by his company since its organization, which he did.

Upon motion of Mr. Denniston, a vote of thanks was tendered to Mr. Slater for his explanation.

Upon motion of Mr. McIlhenny the Convention then adjourned sine die.

SIXTH ANNUAL MEETING

OF THE

AMERICAN GAS LIGHT ASSOCIATION,

Held at the Fifth Avenue Hotel, New York, October 16, 1878.

The Association was called to order by the President, Gen. Roome.

On motion of Mr. Neal, the reading of the minutes of the last meeting was dispensed with.

The following applications for membership were presented : E. V. WHITE, Portsmouth, Va.

F. A. STACEY, Cincinnati, O.

M. S. GREENOUGH, Boston, Mass.

A. H. BARRET, Louisville, Ky.

C. F. SPAULDING, Brookline, Mass.

H. A. ALLYN, Cambridge, Mass.

T. O'C. SLOANE, Ph. D., Brooklyn, N. Y.

G. D. BILL, Malden, Mass.

On motion of Mr. Cartwright the secretary was authorized to cast a ballot for the Association, in the usual form. The President appointed Mr. Cartwright and Mr. Cornell to act as tellers, and the gentlemen named were declared duly elected active members of the Association.

THE PRESIDENT (the new members being presented) said— Gentlemen:-It gives me very great pleasure to receive you among us, to participate with us in our deliberations, to assist us in obtaining that knowledge which is for the benefit of mankind at large, to advance the interests of the companies we represent, and to promote each others happiness and welfare.

I have only to say, further, to these new members, that, pleased as we are to welcome them, the secretary will be still better pleased to get $10 apiece from them, and they will please step up to the secretary's desk and settle. [Laughter.]

The President then addressed the Association as follows:

PRESIDENT'S ADDRESS.

Gentlemen of the American Gas Light Association:-We again have the pleasure of meeting together to consider matters connected with the vast interests committed to our supervision, and I trust I do but echo the general sentiment, when I express the great pleasure it affords me to greet you once more, and to be able to say to you that our progress during the year has been in the highest degree satisfactory.

As I have had the honor of saying to you on former occasions, we move only in accordance with the fixed laws of science, which we cannot alter if we would, but which we may reasonably confess, have not been entirely revealed to us, for we know that what we have accepted in the past as absolute truth, has, in the course of study and investigation been demonstrated to be otherwise; hence, we see that it still remains for us to wrest from the hitherto unknown whatever may appear calculated to lead us in the path toward perfection.

Permit me to suggest, that although many of us have given the best years of our lives and the most earnest devotion of which we have been and are capable, to the advancement of our profession, still we are none of us masters, in the sense that there is nothing for us to learn, but only students, willing to sit at the feet of any one who can teach, and from whose experience we may learn. Let me say, too, that we come here, not with any selfish motives, not for individual advancement, or the acquisition of personal fame, but only and always that, placing the fruits of our individual study and application upon the common altar, we may cull therefrom the choicest flowers, and in our own homes and laboratories draw from them the incitement to future and better progress. Whatever we may gain is not for ourselves-for we must pass away and be fogotten-but for the interests of