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The Starrett 50A improved trammel heads with adjustable divider points (2-1/2” and 3” size) and pencil socket measure the distance between any two points that are too far apart to be reached with dividers. The heads are die cast with black wrinkle finish and have hardened, forged steel points, for easily reproducible and accurate transfer of measurements, scribing lines, arcs, and circles, and marking distances between two points. The heads accommodate a beam up to 3/8” (9.5 mm) thick and 3/4” (19 mm) wide. Calipers measure the distance between two opposing sides of an object. They make inside, outside, depth, or step measurements, according to their type. Calipers are commonly used in architecture, metalworking, mechanical engineering, machining, manufacturing, carpentry, and medicine. The simplest calipers have two legs to mark the two points and require a ruler to take the measurement. More complex calipers use two sets of jaws instead of legs and have up to two graduated scales. Vernier, dial, and digital calipers give direct and accurate readings and are functionally identical, having a calibrated scale with a fixed jaw, and another jaw with a movable pointer that slides along the scale. The vernier caliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement precision. The dial caliper has a circular dial with a pointer on a toothed gear rack replacing the second vernier scale. As with the vernier, this second measurement is added to the reading from the main scale to obtain the result. The dial caliper is used also for measuring size differential between two objects. The digital caliper takes the same sort of differential measurements as the dial caliper by zeroing the display at any point along the slide, with an LCD (replacing the dial) that displays a single, easily read value in both English and metric units. Some digital calipers can hold data readings between measurements and send them to data collection devices. The L. S. Starrett Company was founded in 1880, originally manufacturing bench vises, squares, and other tools. They acquired other companies throughout the years, expanding their services into making precision measurement instruments and tools, such as calipers, micrometers, saw blades, and gauges. Starrett is headquartered in Athol, Massachusetts and has manufacturing facilities in Brazil, the United Kingdom, China, and other locations.

This Thermo Scientific Orion Star A321 pH pH/mV/Temperature Portable Meter Kit includes the 8107UWMMD Orion ROSS Triode 3-in-1 pH/ATC probe with 3m cable, 910410 Orion pH 4.01 buffer (10 pouches), 910710 Orion pH 7.00 buffer (10 pouches), 911010 Orion pH 10.01 buffer (10 pouches), 810001 Orion ROSS electrode storage solution (475 mL), and 911110 rinse solution (10 pouches). It also comes with protective armor with the electrode holder and a hard carrying case. The Thermo Scientific Orion Star A321 pH Portable Meter is the top choice for advanced measurements on location. Get the information you need quickly and easily from the large, backlit graphic LCD display. Informative display shows pH/mV/RmV and temperature along with electrode status, time, date, sample ID, user ID and calibration points. Advanced features such as stability and averaging options provide additional options allowing for laboratory accuracy everywhere you need it. Anyone can use this meter with its plain language screen prompts, soft keys that update for easy selection and a multi-language interface that supports English, Spanish, French, Italian, German and Chinese. The AUTO-READ locks in the stable reading on your screen, ready indicator alerts when readings are stable, and timed reading gathers data in specific time intervals. Up to 5 point pH calibration with automatic recognition for USA/NIST and DIN buffers. Fix errors without a complete recalibration with calibration editing. Non-volatile memory holds up to 5000 data points with time and date stamp. Easily transfer data and keep meter software up-to-date with the USB and RS232 ports and complimentary data analysis software. Four AA batteries (included) provide over 800 hours of operation or purchase the universal power adapter (sold separately) to use AC power. Perfectly portable, waterproof and protected to take anywhere with an IP67-rated housing. 3 year meter replacement warranty. The 8107UWMMD Orion ROSS Triode 3-in-1 pH/ATC probe (WPBNC 8pin miniDIN connector, 3m cable) is an epoxy, combination electrode with built in temperature sensor for convenient measurement of both pH and temperature in samples. It features stability, precision and speed combined with a rapid temperature response. Provides more flexibility and enhanced features measurements. All ROSS electrodes are double junction electrodes and can be used in samples that contain TRIS, sulfides and proteins since they do not contain silver or mercury. The ROSS Ultra Triode incorporates the patented ROSS internal reference system that provides superior measurement stability, faster response, greater accuracy and more reproducible results than conventional electrodes. pH Range: -2.00 to 20.000. pH Resolution: 0.1, 0.01, 0.001. pH Relative Accuracy: ±0.002. pH Calibration Points: Up to 5. Calibration Editing: Yes. mV/RmV Range: ±2000.0. mV/RmV Resolution: 0.1. mV/RmV Relative Accuracy: ±0.2mV or ±0.05% of reading, whichever is greater. mV/RmV Standard Oxidation- Reduction Potential ORP Mode: Yes. Temperature Range: -5 to 105 degree C, 23 to 221 degree F. Temperature Resolution: 0.1. Temperature Relative Accuracy: ±0.1. Temperature Offset Calibration: 1 Point. Datalogging Number of Points: 2000 With Time And Date Stamp. Datalogging Log Function: Manual, Ready (Includes AUTO-READ), Timed. Datalogging Log Edit: Delete Individual Points, Group Of Points, Or All. Inputs pH Electrode: BNC, Reference Pin. Inputs ATC Probe: 8-pin mini-DIN. AC Adapter: Optional– Universal, 100 – 240VAC. Battery Power: Included, 4 AAs. Battery Life: 800hrs. Thermo Scientific Orion #: STARA3215.

The data presented in Alabama Notes, Volumes 3 and 4 derive primarily from county court records, specifically wills and deeds, as well as selected marriage books and are supplemented by cemetery records, census records, and numerous other records of miscellaneous origin. A sequel to Mrs. England's Alabama Notes, Volumes 1 and 2 (see Item 1680), the work at hand refers to thousands of ancestors whose records were culled from the counties of Autauga, Bibb, Butler, Clarke, Coffee, Conecuh, Dallas, Greene, Lowndes, Macon, Marengo, Monroe, Perry, Shelby, and Wilcox.The following is a list of some of the families treated: Adams, Autrey, Avery, Bates Benson, Blann, Bowler, Brantley, Burge, Butler, Chapman, Clements, Coleman, Corley, Cunningham, Cutts, Dacus, Day, Digby, Dobbins, Dunaway, Dust, Fike, Flanagan, Foster, Fowlkes, Fuller, Futch, Gayle, Gilmer, Glaze, Greer, Griffin, Hardin, Harris, Heard, Hendrix, Hightower, Hodnett, Holman, Holmes, Huntington, Huston, Irby, Jones, Jordan, King, Lathem, Lewis, Lockett, Lolly, Maples, Maroney, Martin, Mayes, Miller, Mobley, Moffett, Moody, Moore, Morrisette, Murff, Nelms, Nickerson, Nixon, Oakes, Packer, Parker, Phillips, Pickens, Pitts, Rawlinson, Rea, Reynolds, Riley, Risinger, Rogers, Sellers, Smyly, Speight, Stacey, Thames, Thomas, Thurmond, Tubb, Tucker, Wallace, Webb, Weissinger, Whittle, Worley, and Yongue.

Ready for a good scare? Kids will enjoy thrills and chills with the children in these stories who have fun as they demonstrate Christian character based on love for God, parents, and one another. Readers share a scare . . . but, of course, ghouls and ghosts are strictly in the imagination.Dr. Shivers' Carnival: Kyle Conlon discovers that a bizarre carnival has mysteriously appeared overnight-right next door to his uncle's house. He and his three friends, Sara, Sammy, and Brent, set out to investigate. The carnival's owner, Dr. Shivers, invites the four of them to try all the amusements for free-if they're brave enough. Attack of the Killer House: Anna and Jonny Greger are looking forward to a quiet day at home. When Jonny's science project-a robot-attacks Anna, she thinks it's just Jonny playing a joke. But she knows something is terribly wrong when her hair dryer flies, their video game shoots back at them, and the lawn mower takes off on its own. But a house can't attack people. Or can it? Birthday Cake and I Scream: This party's a Real Scream! It's MacKenzie's twelfth birthday. The party is at Creepy the Clown's Pizza Palace. Unlimited play on the video games makes it pretty cool, until Creepy shows up with some games of his own. Soon, all the kids want to win is a chance to get out!

Let's step back to the year 1978. Sony introduces hip portable music with the Walkman, Illinois Bell Company releases the first mobile phone, Space Invaders kicks off the video game craze, and William Kent writes Data and Reality. We have made amazing progress in the last four decades in terms of portable music, mobile communication, and entertainment, making devices such as the original Sony Walkman and suitcase-sized mobile phones museum pieces today. Yet remarkably, the book Data and Reality is just as relevant to the field of data management today as it was in 1978. Data and Reality gracefully weaves the disciplines of psychology and philosophy with data management to create timeless takeaways on how we perceive and manage information. Although databases and related technology have come a long way since 1978, the process of eliciting business requirements and how we think about information remains constant. This book will provide valuable insights whether you are a 1970s data-processing expert or a modern-day business analyst, data modeler, database administrator, or data architect.This third edition of Data and Reality differs substantially from the first and second editions. Data modeling thought leader Steve Hoberman has updated many of the original examples and references and added his commentary throughout the book, including key points at the end of each chapter. The important takeaways in this book are rich with insight yet presented in a conversational writing style. Here are just a few of the issues this book tackles:Has "business intelligence" replaced "artificial intelligence"?Why is a map's geographic landscape analogous to a data model's information landscape?Where do forward and reverse engineering fit in our thought process?Why are we all becoming "data archeologists"?What causes the communication chasm between the business professional and the information technology professional, and how can the logical data model bridge this gap?Why do we invest in hardware and software to solve business problems before determining what the business problems are in the first place?What is the difference between oneness, sameness, and categories?Why does context play a role in every design decision?Why do the more important attributes become entities or relationships?Why do symbols speak louder than words?What's the difference between a data modeler, a philosopher, and an artist?Why is the 1975 dream of mapping all attributes still a dream today?What influence does language have on our perception of reality? Can we distinguish between naming and describing?From Graeme Simsion's foreword:While such fundamental issues remain unrecognized and unanswered, Data and Reality, with its lucid and compelling elucidation of the questions, needs to remain in print. I read the book as a database administrator in 1980, as a researcher in 2002, and just recently as the manuscript for the present edition. On each occasion I found something more, and on each occasion I considered it the most important book I had read on data modeling. It has been on my recommended reading list forever. The first chapter in particular should be mandatory reading for anyone involved in data modeling. In publishing this new edition, Steve Hoberman has not only ensured that one of the key books in the data modeling canon remains in print, but has added his own comments and up-to-date examples, which are likely to be helpful to those who have come to data modeling more recently. Don't do any more data modeling work until you've read it.