10906. Cross, W.   The Post-Laramie Beds of Middle Park, Colorado.   Colorado Scientific Society, 1892, Proceedings, 27 pages.   Printed wraps detached but present, previous owner marks on front wraps, crease down center, usual signs of use and age discoloration, text in good plus condition.    $19.00

10905. Cross, W.   The Post-Laramie Beds of Middle Park, Colorado.   Colorado Scientific Society, 1892, Proceedings, 27 pages.   Printed wraps detached but present, previous owner marks on front wraps, crease down center, usual signs of use and age discoloration, text in good plus condition.    $19.00

10904. Hale, I.   The Latest Method of Electric Car Control.   Colorado Scientific Society, 1893, Proceedings, 12 pages and 3 fold out charts.   Printed wraps, minor previous owner marks on front wraps, usual signs of use and age, text in very good condition.    $11.00

10903. Freeland, F. T.   The Solution of the Equations, X^2 + Y = 7, X + Y^2=11.   Colorado Scientific Society, 1893, Proceedings, 7 pages.   Printed wraps, minor previous owner marks on front wraps, usual signs of use and age, text in good plus condition.    $8.00

10901. Anderson, N.   Notes on the Precipitation of Precious Metals from the Cyanide Solutions by Means of Zinc.   Colorado Scientific Society, 1895, Proceedings, 4 pages.   Printed wraps, previous owners marks on front wrap, usual signs of use and age, text in good plus condition.    $5.00

10899. Headden, W. P.   A Study of some Colorado Coals - A Comparison of some Coals from Boulder, Routt and Delta Counties.   Colorado Scientific Society, 1907, Proceedings, 8 : 281-300.   Printed wraps, detached and chipped but present, minor moisture stain along back top that does not impact text, uncut text in good plus condition.    $8.00

10898. Guiterman, F.   Report of the Executive Committee and Paper on the Use, Non-Use, and Waste of the Mineral Resources of Colorado.   Colorado Scientific Society, 1911, Proceedings, 9 : 431-450.   Printed wraps, chipping, tape repair to back wrap, and some age discoloration, uncut text in good condition.    $8.00

10897. Editor.   Report of the Committee on Uniform Mine Accident Laws.   Colorado Scientific Society, 1913, Proceedings, 10 : 279-414.   Printed wraps, chipping and some age discoloration, text in very good condition.    $26.00

10896. Collins, G. E.   Report of the Executive Committee for the Year 1913 and Paper on the Systematic Testing in the Evolution of Mill-Practice.   Colorado Scientific Society, 1913, Proceedings, 10 : 431-452.   Off-print, usual signs of use and age discoloration, uncut text in good condition.    $8.00

10894. Welch, L. C.   The Manufacture of Lubricating Products from Wyoming and Colorado Crude Oils.   Colorado Scientific Society, 1921, Proceedings, 11 : 274-294.   Printed wraps, previous owner marks on front wraps, usual signs of use and age, text in good plus condition.    $5.00

36795. Tweto, O.   Stratigraphy of the Pando Area, Eagle County, Colorado.   Colorado Scientific Society, 1949, Proceedings of the Colorado Scientific Society, 15 (4) : 149-235, 4 figures.   Printed cover, stapled text, minor signs of use and age, very good condition.    $19.00

36796. Eckel, E. B.   Research Needed in Engineering Geology.   Colorado Scientific Society, 1951, Proceedings of the Colorado Scientific Society, 12 pages.   Off-print, minor signs of use and age, very good condition.   Presidential Address delivered before the Colorado Scientific Society December 18, 1950.   $4.00

36794. Bush, A. L.   Sources of Lightweight Aggregates in Colorado.   Colorado Scientific Society, 1951, Proceedings of the Colorado Scientific Society, 15 (8) : 305-368, 6 figure location maps and 1 table.   Printed cover, stapled text, minor signs of use and age, very good condition.   Prepared as part of the program of the interior department for the development of the Missouri River Basin.   $12.00

102454. Stokes, W. L. and Varnes, D. J.   Glossary of Selected Geologic Terms with Special Reference to Their Use in Engineering.   Colorado Scientific Society, Denver, Colorado, 1955, CSS, Proceedings, Volume 16 : 165 pages.   Hardbound, minor cover wear, previous owners name, text in very good condition.    $11.00

77263. Stokes, W. L. and Varnes, D. J.   Glossary of Selected Geologic Terms with Special Reference to Their Use in Engineering.   Colorado Scientific Society, Denver, Colorado, 1955, CSS, Proceedings, Volume 16 : 165 pages.   Hardbound, minor cover wear, previous owners name, text in very good condition.    $15.00