recently published, there is a special sheet showing depths to water, area of flow, etc., in the region east of Pueblo.

The report on the artesian basin in the San Luis Valley is almost completed.

The report on the detailed investigation made of the underground waters and geologic structure of the Uncompahgre Valley is approaching completion. It will set forth the principal structural features and indicate all geologic conditions bearing on the underground-water problem.

Montana. The geology of the Bighorn Mountains has been investigated and a report is now in press (Professional Paper No. 51). It has also been ascertained from the results of recent field work in the region north of the Black Hills that an artesian basin of great importance extends down the valley of Little Missouri River in the southeast corner of the State. The underground-water conditions in this area will be set forth in a report on the region north of the Black Hills, soon to be published.

Nebraska.-No new field work was done in this State, but reports on the artesian conditions in the northeastern and south-central portions of the State are being prepared and will soon be transmitted for publication.

New Mexico.-An extensive investigation has been made of the geologic structure in the south-central portion of the State, especially in the Rio Grande Valley and vicinity. Some of the results of this investigation have recently been prepared and transmitted for publication. A report on the Roswell artesian area is in press as Water-Supply Paper No. 158.

North Dakota. -Field work was continued in the Red River Valley artesian area and a portion of the country westward, especially with the view of preparing a general report on the underground waters of the State. The office work on the results has not yet been completed.

South Dakota.-The investigation of the underground-water conditions and geologic structure of the northern Black Hills region was continued and nearly completed. Progress was made in the preparation of the report on the results of this work, but additional data are required before it can be transmitted for publication. Work was also continued in the artesian area of the James River Valley, and the results of this investigation have been prepared for presentation in two folios, one comprising the Aberdeen, Northville, Redfield, and Lake Byron quadrangles, and the other the Elk Point quadrangle. These two folios contain a large amount of information regarding the underground-water conditions and are nearly ready for publication.

Texas. During the last field season an investigation was made of the geology and underground-water conditions in the western half of the Panhandle. The El Paso folio has been completed and is ready

for publication. It contains a detailed account of the undergroundwater conditions in a portion of the Rio Grande Valley.

Utah.-The field work in this State consisted of a detailed investigation of the underground-water conditions in the Sevier and San Pete valleys. A report of the results of this investigation is in preparation.

Wyoming. Three parties continued field work in this State, partly to complete investigations begun in previous seasons and partly to begin investigations in areas which had not before been examined. The study of the structure of the uplifted beds along the flanks of the Bighorn Mountains was continued southward to the end of the range and then westward in the Bridger and Owl Creek mountains to the end of the latter. The results were incorporated in part in the report on the Bighorn Mountains (Professional Paper No. 51) and in part in a report on the Owl Creek Mountains and adjoining regions (published as S. Doc. No. 219, 59th Cong., 1st sess.), which contains a large amount of information relating to the portion of the Shoshone or Wind River Reservation, which is to be opened for settlement this summer. The examination of the Bighorn basin was continued southward to include all of the area to the foot of the Owl Creek and Bridger ranges, and the results were incorporated in the report prepared last year, which has been transmitted for publication.

An investigation of the geologic structure and its bearing on the underground-water conditions in the Laramie basin was begun and nearly completed, and an examination was made of a portion of the foothills of the Laramie Range west of Cheyenne.

The results of the work of previous seasons in the Wyoming portion of the northern Black Hills were prepared for incorporation in the report on the northern Black Hills region.

PUBLICATIONS.

The following reports were issued:

Water-supply and irrigation papers:

123. Geology and underground-water conditions of the Jornada del Muerto, New Mexico.

136. Underground waters of Salt River Valley.

137. Development of underground waters in the eastern coastal plain region of southern California.

138. Development of underground waters in the central coastal plain region of southern California.

139. Development of underground waters in the western coastal plain region of southern California.

142. Hydrology of San Bernardino Valley, California.

148. Geology and water resources of Oklahoma.

149. Preliminary list of deep borings in the United States, second edition.

154. The geology and water resources of the eastern portion of the Panhandle of Texas.

157. Underground waters in the valleys of Utah Lake and Jordan River, Utah.

The following publications are in press:

Water-supply papers:

158. Geology and water resources of the Roswell artesian basin, New Mexico. 181. Geology and water resources of Owens Valley, California.

Professional papers:

51. Geology of Bighorn Mountains.

52. Geology and underground waters of the Arkansas Valley in eastern Colorado. 53. Geology and water resources of the Bighorn basin in Wyoming.

DIVISION OF HYDRO-ECONOMICS.

The investigations and reports of this division are confined to the quality of water and its suitability for domestic and industrial uses. The waters in by far the greater part of the country contain ingredients varying in amount, character, and degree of harmfulness. To secure the highest development of water resources it is necessary to determine these characteristics and to classify the waters according to their favorable or unfavorable effects upon different kinds of manufactured products and upon the health of the people.

WORK BY STATES.

Maine.-Analyses were made of daily samples of water from Androscoggin River for study of the effect of sulphite pulp wastes upon the water.

Massachusetts.-Investigations were made to determine the best methods of treatment of sulphite wood pulp wastes and straw board The work was done in cooperation with the laboratory of sanitary research of the Massachusetts Institute of Technology.

wastes.

New York. The study of interstate pollution in the Hoosick drainage area was completed and investigation was made of the character of ground waters in the central part of the State.

Pennsylvania.-Unpolluted samples were collected in the eastern part of the State and examined for the purpose of constructing a normal chlorine map; in the Allegheny and Monongahela drainage areas a study was made of stream pollution and of the quality of water available for domestic and industrial purposes.

New Jersey and Delaware.-Unpolluted waters were collected and examined in order to obtain data for a normal chlorine map.

Maryland, Virginia, and West Virginia.-An investigation was made of the causes and effects of stream pollution in the Potomac River basin, and unpolluted waters were collected and sampled in order to determine the normal chlorine content.

Ohio. Under cooperative agreement with the Ohio State board of health, investigations were carried on to ascertain the damage caused by various industrial wastes upon the water-supply resources of the State, and experiments were made to determine the best methods of purifying and recovering valuable ingredients in acid-iron wastes, dye

wastes, and distillery slops. Investigations were made, also, of the efficiency of sewage-disposal plants and of the effects of the effluents upon streams and of the persistence of such ingredients in various rivers.

Kentucky.-Underground waters of the Blue Grass region were analyzed in order to determine their adaptability for household and industrial uses.

Illinois.—Preliminary investigations and negotiations were carried on preparatory to the execution of a cooperative agreement with the State water survey, the State board of health, the State Geological Survey, and the engineering experiment station of the University of Illinois.

Iowa. An investigation was made of the character of ground waters from various water-bearing strata thruout the State for the purpose of determining the suitability of the waters for use in boilers and for manufacturing purposes. This work included a study of the methods of treatment necessary to make such water satisfactory for domestic and industrial purposes.

Minnesota. Under a cooperative agreement with the State board of health, the field work for an investigation of the character of surface waters was completed and the report has been prepared in part. Louisiana.-Analyses have been made of daily samples of water taken from Mississippi River above New Orleans for the purpose of determining the total amount of denudation in the Mississippi River system.

California.-Under a cooperative agreement with the State board of examiners and under an appropriation provided by the California general assembly, daily samples of water from the principal streams of the State were examined. The purpose of the work was to determine the amount and variability of the objectionable ingredients in the waters of the State, to ascertain the best methods of treatment, and to determine the seasons of the year during which the waters may best be impounded for domestic and manufacturing purposes.

PUBLICATIONS.

The following water-supply papers were issued:

144. The normal distribution of chlorine in the natural waters of New York and New England.

151. Field assay of water.

152. A review of the laws forbidding pollution of inland waters in the United States, second edition.

The following papers are in press:

161. Quality of water in the upper Ohio River basin and at Erie, Pa.

179. Prevention of stream pollution by distillery refuse.

PUBLICATION BRANCH.

EDITORIAL DIVISION.

SECTION OF TEXTS.

There were engaged in the work of the textual section of the editorial division about the same number of persons as last year-7 all of the time and 2 others much of the time-and the amount of work done was approximately the same, viz:

Manuscript pages edited, 35,131 (last year, 37,026), consisting of 1 Survey annual report, 1 Reclamation annual report, parts of 2 mineral resources annuals, 1 monograph, 8 professional papers, 24 bulletins, 30 water-supply papers, 15 geologic folios, and miscellaneous matter.

Proof read, final pages, 17,936 (last year, 18,382), consisting of 1 Survey annual report, 1 Reclamation annual report, parts of 2 mineral resources annuals, 13 professional papers, 18 bulletins, 41 watersupply papers, 13 geologic folios, and miscellaneous matter. These publications required the handling of 7,861 galley proofs and 32,256 page proofs (handled last year, 7,449 galley proofs and 33,415 page proofs).

Indexes prepared, 15,034 pages (last year, 15,530), for 1 Survey annual report, 2 Reclamation annual reports, 1 mineral resources annual, 12 professional papers, 16 bulletins, 37 water-supply papers, and miscellaneous matter.

In addition to performing the above-noted work on the regular series of publications, this section examined the copy and proofs of all account and record books and blanks, circulars, office cards, etc., and during the last five months of the fiscal year a considerable portion of the editor's time was given to the work of the assistant committee on editorial methods in the Departments.

SECTION OF GEOLOGIC MAPS.

At the beginning of the year work was in progress on 10 folios, all of which have since been published, and 12 others were on file. Four of these (Bald Mountain, Cloud Peak, Dayton, and Fort McKinney) have been combined into two double folios, and the Lancaster, Wis., has been combined with the Mineral Point folio. During the year 12 folios were transmitted to the section for publication, and 14 (Nos. 126 to 139, inclusive), as listed in the following table, were completed and issued: