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Damage to a specimen, or to the air scribe itself, can occur in several ways. Almost always it is due to operator error. The air scribe is very powerful and quite capable of quickly boring into mineralized bone or shell--with dire consequences. The reciprocating, or in-and-out, movement of the tool can actually pull the bit through the specimen in a series of millisecond-long bites that can leave the operator in a panic. The secret is to completely familiarize yourself with surface texture, color, and physical properties of both the fossil and the matrix--these are unique and vary greatly between specimens. Let the machine do the work. Knowledge of texture and color lets you know when to lighten up and pull away, and, for the most part, the movement of the chisel tip without any help except guidance from the operator is sufficient to reduce matrix to a fine debris. This is perhaps the most difficult technique to learn because it is human nature to think that force from our own muscles will make the job faster. Quite the contrary, the application of too much pressure only ensures that your lab will be filled with an incessant whining, your air scribe life span will be considerably reduced, and you may snap off fairly expensive chisel bits. In addition, because air scribes are so powerful, the bit should never be used as a lever. It is the reciprocating movement of the tip of the bit that effectively breaks apart the rock matrix. Wedging the bit into the rock, twisting, or levering off larger chunks not only breaks chisel bits, but also rapidly transforms your air scribe into a useless paperweight. With proper care, common sense, and regular lubrication, a pneumatic air scribe will last for years and will enable you to prepare fossils from nearly any matrix. Lab technicians are also finding that air scribes enable them to develop fossils in a way never before available to them, bringing out details of specimens impossible with older, more traditional technologies. If pace of play is an issue, pace of shower will be, too, because individuals tend to move at the same pace off course as they do on. Red, a mortgage broker who has ridden low interest rates to about four golf trips a year over the past decade, says waiting will set him off. "Some guys are just high-maintenance. It''s all about them," he says. "They take 10 minutes longer than anyone else in the shower. They can''t find their stuff. They''re late for the tee time. It''s 7 o''clock, you''ve got a dinner reservation and they''re on the phone to Honey Pie. We had one guy, no names, who did laundry three times a day. Thank God he had a sense of humor." Red and his buddies didn''t exactly confront the culprit, of course. They needled him to death. He kept washing, but faster. (Note: In my experience, the laundry problem is not widespread.) There are so many great things about golf trips--eating whatever you want, drinking whatever you want, going through cigars as if they were Altoids--that it''s easy to overlook the negatives until you''re confronted with them. These begin with the fact that you generally room with a person who has eaten, drunk and smoked whatever he wanted. You hear it time and time again: "Can you believe how much that guy snored last night?" ©2003 www.band-saws-for-sale.com. All rights reserved. |
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