Collection Contents

Report on placer gravels, Fairbanks district, Alaska, 1909 - Parts I - IV1909

Report on placer gravels, Fairbanks district, Alaska, 1909 - Part V Appendix1909

Report on placer gravels, Fairbanks district, Alaska, 1909 - Maps (plates I, II, III)1909

Report on placer gravels, Fairbanks district, Alaska, 1909 - Maps (plates IV, V, VI)1909

Report on placer gravels, Fairbanks district, Alaska, 1909 - Maps (plates VII, VIII)1909

Field notebook, J.F. Newsom, 1915

Kampar sizing data - Data on screening tests of ores and sands from various parts of the Malay States. Jan. 29, 1920

Data on sizing tests at Kuala Lumpur - Data on displacements and sizes of ore, clay and sands from the Malayan region. Also curves giving the results of screen tests.Feb. 10, 1921

Data on sizes and character of bank material and dredge tails on a representative property. Also on character of tin lost and on losses in Dulong Washing.

Hindered settling ratios - Table taken from Denver Engineering Works Company.1909

Free settling rates - Curves

Screen tests on tin ore

Comparison between Yukon Gold Screen and I.M.& M. Screens - Two letters and several tables.Feb. 4, 1923

Classifier computations - 64 pages of computations for designing classifiers and curves setting forth the results of the computations based on actual screen analyses of ore and sands.1923

United Engineers Dredge Construction Program - An extract from the report of the United Engineers from "The Times of Malaya."Oct. 19, 1925

Neill jig experiments - Letter and table from the Union Construction Company giving results or tests on Neill jigs.1921

Value data - Charts and tables for calculating the value in the ground of tin ore with varying amounts of tin per cubic yards and varying prices for the productAug. 18, 1921

Dredge costs and weight - Rough estimate of the cost and weight of dredges and the crew required1921

General principles - A statement of the problems to be met, the experiments necessary to meet them and the general method of procedure to followJune 25, 1922

Spitz-kasten compared with double current classifier and results - A table giving comparisons of loss in jigs tailings when working a product from a Spitz-kasten classifier as compared with the double current classifier1922

Photographs of Yukon Gold Co. dredge M-4 - Photographs of the general arrangement and the jig floor during construction1923

Tin dredging compared with gold dredging - A statementMarch 29, 1923

Preliminary instructions to jig operators - A statement of general principles and detailed instructions for operation of jigs and classifierApril 10, 1923

Jig strokes and speeds - A letter to A.J. Kelman enclosing tables showing length and speed of stroke on the Kampar and Ampang dredgesFeb. 29, 1923

Comparison between tables and jigs - An engineering cost analysisOct. 26, 1923

Power requirements - Power required for 7-1/2 ft. dredge1923

Cost data - Estimates of costs of jigs and classifiers compared with costs of sluices1923

Capacity test - Letter setting forth conditions and results of capacity tests on classifier-jig systemNov. 25, 1923

Hutch water - A statement of general principles after talking with A.W. Farhenwald by J.B.NJuly 16, 1926

Jig feed - The ideal to be aimed for. A general statement after talking with A.W. FahrenwaldJuly 16, 1926

Results of capacity test - A letter giving details of testNov. 23, 1923

Capacity, cost, and weights of classifiers and jigs - Letters and detailed statement1923

Dimensions, launder slopes, etcDec. 12, 1923

Cost and profit estimatesJan. 1, 1924

General statement submitted to United Engineers - A general statement setting out the principal advantages of the classifier-jig systemFeb. 29, 1924

Comparison of results - A series of tables giving financial comparisons between classifier-jig dredges and sluice dredgesJan. 15, 1924

Construction of Cooley jig - working drawings for a steel jig.

Letters to Malayan tin enclosing drawings - General letters specific about sluice gradesFeb. 11, 1924

Photographs of samples - 12 photographs illustrating graphically the results to be expected from jigs working on a classified product1924

Sketch of packed jig bed - A sketch illustrating the losses in a jig bed which has been allowed to pack and setting forth the methods of keeping the bed freeAug. 6, 1926

Conditions of testNov. 25. 1923

List of documents taken to Singapore by J.B. NewsomAug. 14, 1926

Photos

Assorted charts, tables, graphs

J.F. Newsom - Memos regarding Kuala-Lumpur mining1921-22

Articles1923, 1938

Album of photographs of mining operations, possibly in Malaya

Published article on tin, with some photographs taken by J.B. Newsom

Drawings: