The Pythagorean Proposition by Elisha S. Loomis

By Elisha S. Loomis

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Most of these extraneous materials will float to the top of the. sample tray when it is immersed in water, and so can be separated and discarded at once. Others may need more careful observation. Generally, the sudden appearance of a flood of fresh-looking material, which occupies the greater part of a sample, is enough to put the sample-logger on his guard. As a check, he can consult the well record for lost circulation troubles, and the kinds of materials introduced into the hole. 22 Cement Cement fragments in cuttings are easily mistaken for sandy, silty, 26 or chalky carbonate.

Fit core. Space rubble between ends of core. sample sack and record depths. F i t Core Core Rubble Put rubble in Core Mark core fit if other than " g o o d " . Good F i t No marks necessary Poor F i t No F i t One chevron each Two chevrons on each side of break side of break 6. Strap core. The unrecovered interval is understood to be at the bottom unless known otherwise. 7. Scribe core with reference lines and depths, using felt marker pens and straight edge. Black line always to the right; red line always to the left (this orients core for top and bottom).

W. ), p. 140-156. 1 Equipment and Supplies for Routine Sample Examination The following is an alphabetical listing of the principal items needed for sample examination in a well-equipped office. This list is not intended to -include all items needed for specialized stratigraphic studies, nor equipment needed for a sedimentation or core laboratory. Acid, hydrochloric; 10% or 15% solution Alizarin Red S dye Beakers (50 ml) Bottles, dropper or wash. or glycerine Use for acid, chlorothene, mineral oil, Brush (paint brush) for cleaning sample examination tray Carborundum stone (paper or powder) or silicon carbide grit Cement: Lakeside 70 plastic cement, or Canada balsam Comparators for size, sorting, roundness, sphericity and percentage (may all be photographs) Chlorothene Dictaphone or tape recorder Fluoroscope or ultraviolet light Glycerine Hot plate (electric) India ink (black, red, green) Lamp for microscope, with frosted and blue filters Log forms (standard) Logs (drilling time and mechanical) for wells under study Magnet (pocket size) Manual (standard sample logging manual) Mineral oil (Nujol) Microscope, binocular, with polarizing attachment desirable Pan (wash pan), glass or plastic, for wetting samples Pen (Rapidograph 00) for logging Pencils (Eagle Verithin) in all standard colors Plate (preferable glass) Probes (dental probes work well) 1-2 Ruler or triangle Scoop for picking up samples Shield, log pattern Sieves (ASTM No.

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