PROCEEDINGS OF THE TWENTY-FIFTH ANNUAL CONVENTION OF THE ASSOCIATION OF OFFICIAL AGRI

CULTURAL CHEMISTS.

FIRST DAY.

THURSDAY-MORNING SESSION.

The twenty-fifth annual convention of the Association of Official Agricultural Chemists was called to order by the president, Mr. Harry Snyder, of St. Anthony Park, Minnesota, on the morning of November 12, in the Annex Hall of the Normandie Hotel, Washington, D. C.

Two hundred and sixteen members and visitors registered during the convention, constituting the largest attendance ever recorded. The list is as follows:

MEMBERS AND VISITORS PRESENT.

Adams, Arthur B., Bureau of Internal Revenue, Washington, D. C.

Albrech, Maximilian C., U. S. Food and Drug Inspection Laboratory, Pittsburg, Pa. Allen, Robert McD., Agricultural Experiment Station, Lexington, Ky.

Alwood, William Bradford, "Stonehenge" Laboratories, Charlottesville, Va.

Amoss, Harold L., Bureau of Chemistry, Washington, D. C.

Averitt, S. D., Agricultural Experiment Station, Lexington, Ky.

Bailey, Herbert S., Bureau of Chemistry, Washington, D. C.

Baker, E. L., Geneva, N. Y.

Balcom, R. Wilfred, Food and Drug Inspection Laboratory, New York, N. Y.
Barber, Kate G., Bureau of Chemistry, Washington, D. C.

Barnard, Harry E., State Food and Dairy Commission, Indianapolis, Ind.
Bartlett, James M., Agricultural Experiment Station, Orono, Me.

Bates, Carleton, Bureau of Chemistry, Washington, D. C.
Beal, W. H., Office of Experiment Stations, Washington, D. C.
Bell, James Munsie, Bureau of Soils, Washington, D. C.
Bidwell, George L., Bureau of Chemistry, Washington, D. C.
Bigelow, Willard D., Bureau of Chemistry, Washington, D. C.
Billings, George A., Department of Agriculture, Washington, D. C.
Bowker, W. H., Bowker Fertilizer Company, Boston, Mass.
Boyle, Martin, Bureau of Chemistry, Washington, D. C.

Boyles, Frank M., Bureau of Chemistry, Washington, D. C.

Breazeale, James Frank, Bureau of Chemistry, Washington, D. C.

Breckenridge, John E., American Agricultural Chemical Company, New York, N. Y.

Bridges, Benjamin H., Food and Drug Analyst to State of Florida, Tallahassee, Fla.
Brinton, Clement S., U. S. Food and Drug Inspection Laboratory, Philadelphia, Pa.
Broughton, Levin B., Agricultural Experiment Station, College Park, Md.
Browne, Charles A., New York Sugar Trade Laboratory, New York, N. Y.

Bryan, A. Hugh, Bureau of Chemistry, Washington, D. C.

Bryan, Thomas J., State Analyst, Chicago, Ill.

Burnet, Wallace C., U. S. Food and Drug Inspection Laboratory, Savannah, Ga. Burnett, Lyle B., Bureau of Chemistry, Washington, D. C.

Campbell, Walter Gilbert, Bureau of Chemistry, Washington, D. C.

Carpenter, Frank B., Virginia-Carolina Chemical Company, Richmond, Va.

Carroll, John S., German Kali Works, Atlanta, Ga.

Castleman, Philip, Department of Agriculture, Washington, D. C.

Cathcart, Charles S., Agricultural Experiment Station, New Brunswick, N. J.

Cavanaugh, George W., State College of Agriculture, Cornell University, Ithaca, N. Y.

Chace, E. M., Bureau of Chemistry, Washington, D. C.

Chapin, Robert M., Bureau of Animal Industry, Washington, D. C.

Chesnut, Victor King, Bureau of Chemistry, Washington, D. C.

Church, C. G., Bureau of Chemistry, Washington, D. C.

Cochran, C. B., Department of Agriculture, West Chester, Pa.
Cole, Frank, College Park, Md.

Collins, Arthur T., Philadelphia, Pa.

Collins, Paul, Agricultural College, College Park, Md.

Collins, William Dennis, Bureau of Chemistry, Washington, D. C.

Cook, Frank C., Bureau of Chemistry, Washington, D. C.

Davidson, Robert James, Polytechnic Institute, Washington, D. C.

Deemer, Ralph B., College Park, Md.

Denis, Willey, Bureau of Chemistry, Washington, D. C.

Dietrich, Harry W., Noblesville, Ind.

Dodge, C. O., Bureau of Chemistry, Washington, D. C.

Donk, M. G., Bureau of Chemistry, Washington, D. C.

Doolittle, Roscoe E., U. S. Food and Drug Inspection Laboratory, New York, N. Y. Doran, James M., Bureau of Internal Revenue, Washington, D. C.

Dorset, Marion, Bureau of Animal Industry, Washington, D. C.

Doyle, Aida M., Bureau of Chemistry, Washington, D. C.

Dubois, Wilbur Latimer, U. S. Food and Drug Inspection Laboratory, Buffalo, N. Y. Dunbar, Paul B., Bureau of Chemistry, Washington, D. C.

Dunlap, F. L., Bureau of Chemistry, Washington, D. C.

Eaton, Edgar O., Bureau of Chemistry, Washington, D. C.

Edmond, Herman D., Agricultural Experiment Station, Storrs, Conn.
Ellett, Walter B., Agricultural Experiment Station, Blacksburg, Va.
Emery, James Armitage, Department of Agriculture, Washington, D. C.
Emslie, Benjamin Leslie, Toronto, Canada.

Feldstein, Leonard, Department of Agriculture, Washington, D. C.

Fetzer, Lewis William, College Park, Md.

Fischer, Louis A., Bureau of Standards, Washington, D. C.

Forst, Leo B., Bureau of Internal Revenue, Washington, D. C.

Fox, Paul J., Bureau of Chemistry, Washington, D. C.

Frear, Julia Reno, State College, Pa.

Frear, William, Agricultural Experiment Station, State College, Pa.
Fuller, Aubrey V., Bureau of Animal Industry, Washington, D. C.

Fuller, F. D., Department of Agriculture, Harrisburg, Pa.

Fuller, Henry C., Bureau of Chemistry, Washington, D. C.

Geisler, Joseph F., State Department of Agriculture, New York, N. Y.
Given, Arthur, Bureau of Chemistry, Washington, D. C.

Goodnow, Edw. H., Bureau of Chemistry, Washington, D. C.
Goodrich, Charles E., Bureau of Chemistry, Washington, D. C.
Gore, H. C., Bureau of Chemistry, Washington, D. C.

Gudeman, Edward, Chicago, Ill.

Harcourt, Robert, Ontario Agricultural College, Guelph, Canada.

Hart, B. R., U. S. Food and Drug Inspection Laboratory, Cincinnati, Ohio.
Hartigan, Will H., Bureau of Chemistry, Washington, D. C.

Hartman, Joseph Vance, Washington, D. C.

Hartwell, Burt L., Agricultural Experiment Station, Kingston, R. I.
Haywood, John K., Bureau of Chemistry, Washington, D. C.
Haywood, W. Grimes, Department of Agriculture, Raleigh, N. C.
Hillyer, William Eldridge, Bureau of Chemistry, Washington, D. C.
Holland, Edw. B., Agricultural Experiment Station, Amherst, Mass.
Hite, Bert Holmes, Agricultural Experiment Station, Morgantown, W. Va.
Hoover, George W., Bureau of Chemistry, Washington, D. C.
Hopkins, Cyril G., Agricultural Experiment Station, Urbana, Ill.
Hortvet, Julius, State Dairy and Food Department, St. Paul, Minn.
Houghton, Harry W., Bureau of Chemistry, Washington, D. C.
Howard, B. J., Bureau of Chemistry, Washington, D. C.
Hudson, Claude S., Bureau of Chemistry, Washington, D. C.
Humphrey, H. C., Corn Products Refining Company, New York, N. Y.
Ingersoll, Edwin Henry, Bureau of Animal Industry, Washington, D. C.

Jacobs, Benjamin Richard, Bureau of Chemistry, Washington, D. C.
Jaffa, Myer Edward, State Food and Drug Laboratory, Berkeley, Cal.
Jenkins, Lawrence J., Bureau of Chemistry, Washington, D. C.
Jones, Charles H., Agricultural Experiment Station, Burlington, Vt.

Kebler, Lyman F., Bureau of Chemistry, Washington, D. C.
Keister, John T., Bureau of Chemistry, Washington, D. C.

Kellogg, James W., Pennsylvania Department of Agriculture, Harrisburg, Pa.
Kerr, Robert H., Bureau of Animal Industry, Washington, D. C.

Knight, George W., Bureau of Chemistry, Washington, D. C.

Knight, Henry G., Agricultural Experiment Station, Laramie, Wyo.
Knight, Howard L., Office of Experiment Stations, Washington, D. C.

La Bach, James O., Agricultural Experiment Station, Lexington, Ky.

Ladd, Edwin F., Agricultural College, Fargo, N. D.

Lane, Clarence B., Dairy Division, Department of Agriculture, Washington, D. C. Leavens, George D., Agricultural Experts' Association, New York, N. Y.

Leavitt, Sherman, Bureau of Chemistry, Washington, D. C.

Le Clerc, J. A., Bureau of Chemistry, Washington, D. C.

Liepsner, F. W., Bureau of Chemistry, Washington, D. C.

Linder, William Vanarsdale, Bureau of Internal Revenue, Washington, D. C.
Lipman, Jacob G., Agricultural Experiment Station, New Brunswick, N. J.
Loomis, Henry M., U. S. Food and Drug Inspection Laboratory, Seattle, Wash.
Lowenstein, Arthur, Morris & Company, Chicago, Ill.

Lynch, William D., Bureau of Chemistry, Washington, D. C.
Lythgoe, Hermann C., State Board of Health, Boston, Mass.

McCaughey, William John, Bureau of Soils, Washington, D. C.
McCormick, R. A., McCormick & Co., Baltimore, Md.
McCormick, W. M., McCormick & Co., Baltimore, Md.
McDonnell, Henry B., State Chemist, College Park, Md.
McGill, A., Inland Revenue, Ottawa, Canada.

McKeefe, Edward P., State Department of Agriculture, Albany, N. Y.
McNeil, H. C., Bureau of Chemistry, Washington, D. C.

Magruder, Egbert Walton, Department of Agriculture, Richmond, Va.
Martin, Charles W., Bureau of Chemistry, Washington, D. C.

Mason, G. F., H. J. Heinz Company, Pittsburgh, Pa.

Michael, Louis G., Agricultural Experiment Station, Ames, Iowa.

Miller, Charles C., Philadelphia, Pa.

Mitchell, Andrew S., U. S. Food and Drug Inspection Laboratory, St. Paul, Minn.

Moore, C. C., Bureau of Chemistry, Washington, D. C.

Moore, C. S., Bureau of Chemistry, Washington, D. C.

Morgan, Francis Patterson, Bureau of Chemistry, Washington, D. C.

Morgan, Will John, Bureau of Chemistry, Washington, D. C.

Morse, Fred W., Agricultural Experiment Station, Durham, N. H.
Morton, Grant J., Agricultural College, N. D.

Osborne, N. S., Bureau of Standards, Washington, D. C.

Palmore, Julian I., Bureau of Chemistry, Washington, D. C.

Paradis, Elwood M., Maryland Agricultural College, College Park, Md.
Parker, Charles E., Bureau of Chemistry, Washington, D. C.
Parkinson, N. A., Bureau of Chemistry, Washington, D. C.

Patten, Andrew J., Agricultural Experiment Station, East Lansing, Mich.
Payne, Robert L., Baugh & Sons Company, Baltimore, Md.
Pennington, Mary E., Food Research Laboratory, Philadelphia, Pa.
Pierce, Anne L., Bureau of Chemistry, Washington, D. C.
Pinkerton, Thomas C., Baugh & Sons Company, Baltimore, Md.

Price, Thomas Malcolm, Bureau of Animal Industry, Washington, D. C.
Proctor, M. Fergus, Bureau of Chemistry, Washington, D. C.

Read, Effie Alberta, Bureau of Chemistry, Washington, D. C.
Reed, Edward O., Bureau of Chemistry, Washington, D. C.
Richardson, William D., Chicago, Ill.

Rieger, John B., Bureau of Chemistry, Washington, D. C.
Roark, Ruric Creegan, Bureau of Chemistry, Washington, D. C.
Robertson, B. F., Clemson College, S. C.

Robb, John Bernard, Department of Agriculture, Richmond, Va.

Ross, B. B., State Chemist, Auburn, Ala.

Rudnick, Paul, Armour & Co., Chicago, Ill.

Rupp, Dr. Philip, Bureau of Chemistry, Washington, D. C.

Rusby, Henry H., Newark, N. J.

Salant, William, Bureau of Chemistry, Washington, D. C.

Schorger, Arlie William, Bureau of Internal Revenue, Washington, D. C.

Schulz, Henry L., U. S. Food and Drug Inspection Laboratory, Detroit, Mich. Scovell, Melvill A., Agricultural Experiment Station, Lexington, Ky.

Seidell, Atherton, Hygienic Laboratory, Washington, D. C.

Seil, Harvey A., U. S. Food and Drug Inspection Laboratory, New York, N. Y. Sheib, S. H., Tennessee Chemical Company, Nashville, Tenn.

Shepard, James K., Agricultural Experiment Station, Brookings, S. Dak.

Shurly, R. Rex, Bureau of Chemistry, Washington, D. C.

Sindall, Harry E., Weikel & Smith Spice Company, Philadelphia, Pa.
Skinner, W. W., Bureau of Chemistry, Washington, D. C.

Spencer, George Carl, Bureau of Chemistry, Washington, D. C.
Sprague, L. P., Board of Health Laboratory, Burlington, Vt.

Smith, Bernard H., Food and Drug Inspection Laboratory, Boston, Mass.
Smith, F. G., Department of Agriculture, New Orleans, La.

Smither, F. H., Bureau of Chemistry, Washington, D. C.

Snyder, Harry, Agricultural Experiment Station, St. Anthony Park, Minn.
Speare, Howell Davis, Agricultural Experiment Station, Lexington, Ky.

Stephenson, C. H., Bureau of Chemistry, Washington, D. C.

Stewart, Guy Robertson, U. S. Food and Drug Inspection Laboratory, New York, N. Y. Stiles, George W., jr., Bureau of Chemistry, Washington, D. C.

Stone, I. Victor, Maryland Agricultural College, College Park, Md.

Straughn, M. N., Bureau of Chemistry, Washington, D. C.

Street, John Phillips, Agricultural Experiment Station, New Haven, Conn.

Sullivan, Arthur L., Bureau of Chemistry, Washington, D. C.

Taber, Walter C., Bureau of Chemistry, Washington, D. C.

Taylor, James Norman, Bureau of Animal Industry, Washington, D. C.
Taylor, S. F., 108 Hudson Street, New York, N. Y.

Thatcher, Arthur S., Bureau of Chemistry, Washington, D. C.

Thatcher, R. W., Agricultural Experiment Station, Pullman, Washington.
Tolman, L. M., Bureau of Chemistry, Washington, D. C.

Trescot, Thomas Cuthbert, Bureau of Chemistry, Washington, D. C.
Trowbridge, P. F., Agricultural Experiment Station, Columbia, Mo.

Valaer, Peter, jr., Bureau of Internal Revenue, Washington, D. C.

Van Slyke, Lucius Lincoln, Agricultural Experiment Station, Geneva, N. Y.
Veitch, F. P., Bureau of Chemistry, Washington, D. C.

Wade, Harold Rollins, Bureau of Chemistry, Washington, D. C.
Waggaman, William H., Bureau of Soils, Washington, D. C.
Wagner, T. B., Chicago, Ill.

Walker, Percy H., Bureau of Chemistry, Washington, D. C.
Warren, Lewis E., Bureau of Chemistry, Washington, D. C.
Watkins, Howard R., Army Medical Museum, Washington, D. C.
Weber, F. C., Bureau of Chemistry, Washington, D. C.

Wheeler, H. J., Agricultural Experiment Station, Kingston, R. I.
Whitfield, James M., City Board of Health, Richmond, Va.

Wiley, H. W., Bureau of Chemistry, Washington, D. C.

Wiley, S. W., Wiley & Hoffman, Baltimore, Md.

Willard, Julius T., Agricultural Experiment Station, Manhattan, Kans.
Wilson, C. P., Bureau of Chemistry, Washington, D. C.

Winton, A. L., Food and Drug Inspection Laboratory, Chicago, Ill.
Withers, W. A., Agricultural Experiment Station, Raleigh, N. C.

Young, William J., Bureau of Chemistry, Washington, D. C.

REPORT ON FOOD ADULTERATION.

By H. E. BARNARD, Referee.

The demand for analytical data bearing on the composition of normal and abnormal food products that has arisen in the past three years because of the enactment of food legislation has shown most clearly the absolute necessity for accurate, precise, and at the same time rapid methods for food analysis. It did not at first appear that the