At the Arizona-Sonora Desert Museum''s paleontology lab, the air scribe has become daytonadrillpress the workhorse of fossil preparation. The discovery of a large sauropod dinosaur in the highly indurated sandstones of the Mid-Cretaceous Turney Ranch Formation southeast of the museum posed numerous technical problems for our lab staff. Most troubling was the removal of vast amounts daytonadrillpress of sedimentary rock, which was both very tough and firmly cemented by silica to the softer, calcite-replaced bones. Experimenting with a number of hand tools, grinders, hardware-store engravers, and rotary devices, we happened upon a Chicago Pneumatic Air Scribe (see supplier''s address on page 421), and it has since become daytonadrillpress our primary lab tool on this project. We now have five Chicago air scribes, and progress on our dinosaur has been extraordinary. One large and complex midback vertebra, which had been crushed during fossilization, took seven months to prepare with the scribe, but it was in the middle of a 150-pound block of sandstone. Not only was museum preparator Yolaikia Sciole able to remove this complex and fragile vertebra without damage, but ultimately it was prepared from the inside out, exposing most of the internal bone structures, including arterial and nerve canals and never-before-seen pneumatic structures that lightened the bone in life. Most of the bones in this vertebra are no more than 0.25-inch thick and are replaced by easily cleaved, fragile calcite. The air scribe, and a light touch by the preparator, did the trick.

Jamerco of City of Industry Calif., introduces its new Air Palm-Hammer. The palm-sized pneumatic tool has an operating pressure-range of 50-120 PSI and a consumption of 2-4 CFM. It drives a variety of nails and spikes. Operation is triggerless and is performed by pressing the loaded nailer down over the target. The kit includes a standard common nail attachment, a magnetic tip attachment which holds nails in place, a finish nail attachment, a hammer attachment and a complete maintenance kit. A leather glove is also included. In the production of pig iron, brick and refractory materials are used to form the very large ovens or retorts (coke ovens) in which coal is converted to coke. Refractory daytonadrillpress and brick materials are needed to line huge shaft-like blast furnaces in which the molten pig is formed. The auxiliary furnaces or hot blast stoves, which heat the air for the blast furnace, are also lined with refractories. The molten pig iron from the blast furnace is then sent to a brick- or refractory-lined ladle. The molten pig iron is then poured into a brick- or refractory-fined pig casting machine, where the pig iron is formed into large castings and cooled.

* Mac''s favorite attachment is a Rock Hog bucket. "It daytonadrillpress was less costly than a rake and pull-type picker and saves a trip over the field," he says. "It almost makes picking rocks fun."* Tracy uses a pallet fork for hauling and stacking big square and round hay bales, digging large rocks, pulling up fence, and hauling logs, branches, scaffolding, and pallets.* Another farmer says his Brush Hog mower does a great Job mowing wild roses in pastures. "The skid loader also has tracks on it, so even the big stuff pushes over, then I drop the mower on its," he says.

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