plane table to make its use familiar. As the work progresses the notes are plotted on a map to a scale of two hundred feet to the inch. Contours for intervals of five feet are shown as well as all natural and artificial features that can be indicated on the final map. This map will be made at the University during the following term in the course in cartography to a scale of four hundred feet to an inch. In the determination of the elevations of the triangulation stations and bench marks the levels are run in circuit and are required to check with an error not greater than 0.05 ft. times the square root of the distance run in miles. In both the field work and plotting the stadia traverse must check on the triangulation system within a number of minutes equal to the square root of the number of set-ups in the traverse, while a much larger error was allowed in the elevation than in the case where the wye level was used. The students of the Junior class make a survey for a railroad connecting two points from three to five miles apart. A reconnaissance with transit and stadia is first made of the most probable routes. This is followed by a preliminary survey of the line that the reconnaissance has indicated as being the most satisfac tory. In making the preliminary survey the line is staked out in stations one hundred feet apart and stakes called plusses are placed between the station stakes to mark the points at which the line crosses a road, stream, gully or other feature that must be shown on the map and be considered in the estimates. The preliminary line consists of a series of tangents; the magnetic bearing of each tangent is observed as well as the angle of intersection. The elevation of the ground at the stations and plusses is determined and bench marks established by a line of levels. This survey forms a back bone for the topography which is next taken by means of the hand level and tape. Contours and all topographic features are plotted on previously prepared field sheets of cross-section paper, upon which the stations with their elevations are shown. The topography is sketched in on these sheets, it being taken for a distance of three hundred feet on each side of the center line. The preliminary survey is now finished, and a map and profile are plotted. Utilizing the principles of the text-books studied in class, a paper location is made from which sufficient data are obtained for the preparation of notes for the location of the line in the field as drawn on the profile and map of the preliminary survey. The notes thus prepared are for the most part adhered to, but when the line is run out, it may in places, deviate from the paper location, when as viewed on the ground, a different alignment would be more satisfactory. 'n making the location survey stakes are set for circular curves with spiral approaches, and special attention is given to property lines, water courses and road crossings, that they may be shown on the final map and profile which will be prepared at the university during the following term in the course in railroad mapping and earthwork. After the location survey is finished the line is cross-sectioned that the cut and fill may be determined, and the quantities estimated. Finally slope stakes are set and the Junior's work is finished. The camp is under the direct charge of student officers. They are a Chief Engineer, an Assistant Engineer and a Quartermaster. The Chief Engineer is selected by the students attending the camp from a list of names approved by the professor in charge. It is his duty to see that the work progresses in a satisfactory manner, that each day's work is mapped out, and that the daily assignment for each student is properly arranged. The Assistant Engineer is in charge of the commissary, the cook and his assistants. He must see that the expenses are kept as low as is practicable. The Quartermaster has charge of the instruments, issuing them in the morning and receiving them when the parties return to camp. He is also held responsible for the general order of the tents and grounds. At the camp held last June there were twenty students, an instructor and a professor. One of the results of this camp is that the students become sufficiently well familiarized with surveying instruments and methods to serve acceptably as instrument men under exacting requirements and were available to carry on the work left by older men entering the army training camps. MINUTES OF MEETINGS AND BUSINESS OF THE SOCIETY. Minutes Board of Direction Meeting, July 16th, 1917. The meeting was called to order with President Dusenbery, Messrs. Olsen, Riess and Robert present. Applications-The following applications were ordered through the ballot: Leon C. Weis, New Orleans, Resident Member. Edwin J. H. Rodriques, New Orleans, Resident Member. Adolph E. Hartman, Shreveport, La., Non-Resident Member. John Y. Snyder, Shreveport, La., Non-Resident Member. Edward J. Fisher, New Orleans, Transfer from Junior to Resident Member. Andrew J. Wild, Jr., Junior Member. David W. Weidman, Transfer from Student to Junior Member. Edwin A. Arpin, Florence, La., Non-Resident Junior. Bills-On motion of Mr. Riess, seconded by Mr. Olsen, the following bills were approved for payment: D. S. Anderson, salary as editor for February, April and June issues of the Proceedings.. .$150.00 W. T. Hogg, salary and incidentals... 32.50 M. Clay Lejeune, reporting the June Meeting. 5.00 Owen Gernon Co., Binding 12 vols. of Magazines..... 16.75 Fabacher's New Rathskeller, refreshments for the April; May and 23.45 Tulane Press, 4 bills for printing and postage...... 178.79 J. M. Robert, cash advanced Motion Picture Operator, June meeting 7.50 J. M. Robert, cash advanced Motion Picture Operator, May meeting 6.50 and Delinquent Members-Upon motion duly seconded, it was decided to drop from the roll Messrs. for non-payment of dues. Hogg as Secretary of the So- Resignation—The resignation of Mr. ciety was read and upon motion of Mr. the resignation was accepted with regret. Mr. Hogg explained that the acceptance of a new position outside of New Orleans would prevent his further continuing as Secretary of the Society. Nomination-Upon motion of Mr. Riess, seconded by Mr. Olsen, J. M. Robert was elected Acting Secretary from July 1st, at $30.00 per month, with the understanding that if this amount did not cover his expenses, that such expenses would be reimbursed to him by the society. There being no further business before the meeting, the same adjourned. J. M. ROBERT, Secretary. Regular Meeting of the Society, September 10, 1917. The meeting was called to order at 8:20 with President Dusenbury in the chair and fifty-nine members and guests present. The minutes of the June meeting were read and approved. Mr. H. L. Hutson introduced a resolution that the Society offer its services to the New Waterways Commission. These resolutions are appended and made a part of these minutes. Mr. Coleman seconded Mr. Hutson's resolutions and upon vote of the Society, the resolutions were passed. The technical exercises of the evening consisted of an illustrated lecture by Mr. F. J. French of the Mexican Petroleum Corporation, entitled "Notes on Ship Building'. This lecture called forth several interesting discussions from various members and guests. A rising vote of thanks was tendered Mr. French. There being no further business, the meeting adjourned. J. M. ROBERT, Secretary. |