J bow —_" dati, List of Sampling Stations lol Detroit, Mich. 219 Des Moines, Iowa 102 Louisville, Ky. 221 St. Louis, Mo. 103 Knoxville, Tenn. 222 105 Memphis, Tenn. 108 Atlanta, Ga. 30h, Boise, Idaho Philadelphia, Pa. 309 Billings, Montana 116 Pittsburgh, Pa. 310 Salt Lake City, Utah 17 New York (La Guardia), N. Y. 314 Tucson, Arizona 118 Binghamton, N. Y. 3a Grand Junction, Colo. 122 Rochester, N. Y. 323 Albuquerque, Ne M, (127 New Haven, Conn. 326 Las Vegas, Nevada | 132 Jacksonville, Fla. 4Ol Seattle, Wash, 133 Miami, Fla. hok Medford, Oregon 134 Washington, D.C. 407 San Francisco, Calif. 137 Cleveland, Ohio 410 Los Angeles, Calif. 138 Cape Hatteras, N.C. 501 Anchorage, Alaska 139 Concord, New Hampshire $02 North Bay, Ontario Boston, Massachusetts 503 Moosoonee, Ontario Corpus Christi, Texas 50h Moncton, N. &. Dallas, Texas 505 Montreal, Quebec 209 Wichita, Kansas 507 Seven Islands, Quebdcs 211 Scottsbluff, Nebraska 508 Winnipeg, Manitoba 212 Rapid City, S. D. 509 Churchill, Manitoba 216 Minneapolis, Minn. 510 Regina, Saskatchewan . 215 20 206 - 225 8-9- Chicago, Tl. New Orleans, La.