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How to Read a Vernier Scale on the Theodolite

Perhaps you have seen a team of surveyors decked out in their orange vests along the roadside viewing the land through what looks like a telescope. That telescope is actually a theodolite, a tool used to measure angles that is not exclusive to surveying crews. Since the 17th century, theodolites have been the primary tool […]



How to Read an Indicator Color Chart

Indicator color charts come in different varieties and are used to show the pH of a substance. Chemical compounds that change color in response to acid or base materials are usually embedded in a piece of paper or other substrate. The substance being tested is then applied, turning the compound a new color. The simplest […]



How to Read a Dodge VIN Number

VIN (vehicle identification number) numbers on Dodge vehicles are not just sequential serial numbers for the product. They offer historical information about the individual vehicle, from its inception to more advanced information and data now available, such as whether the vehicle has been in an accident. Although VIN history reports may not always be free, […]



How to Read Baseball Signals

Some baseball signs are obvious, such as an umpire’s safe and out signs or the third base coach’s arms waving wildly in a circle telling the base runner to make a run for home plate. Other signs are not as clear. Paul Dickson, author of "The Hidden Language of Baseball," estimates that in any given […]



How to Read EBV Blood Test Results

The Epstein-Barr Virus, or “EBV” blood test, determines whether or not a person has mononucleosis. The marker this test looks for is the amount of anti-bodies, or the heterophile aggluntination antigens present. False positives may occur in patients with hepatitis, lymphoma, rubella or lupus. Locate the section with blood readings starting with “EBV.” There will […]



How to Speed Read With a Kindle

The Kindle, an e-reader from Amazon, displays e-books on an E Ink display. You flip pages using two buttons located on each side of the device and can make minor changes to the book, such as increasing the font size and changing the screen orientation. Speed reading, the act of reading text quickly, is different […]



How to Read Harp Music

Music written for the harp is written on the grand staff, which encompasses both treble and bass clefs, and uses a numbering system to indicate which fingers are to be used to play specific notes. Since there is only a small percentage of songs arranged for harp in commercial sheet music, many harp players will […]



How to Read a Stock Ticker

Edward Calahan invented the stock ticker in 1863 and the New York Stock Exchange installed the first stock ticker in 1867. Messengers used to run price updates from the exchanges to brokers’ offices prior to the ticker. You may spot stock tickers scrolling across financial websites or on digital displays inside and outside financial buildings. […]



How to Read an SDHC Memory Card

High-capacity SD cards offer more memory than standard SD cards, storing up to 32GB of data. But these cards are not compatible with all devices that read SD cards. Reading an SDHC card from a compliant device or compatible card reader takes little more than inserting the card. But certain procedures may allow other devices […]



How to Calculate Reading Light Requirements

It’s convenient to have an extra light in a room specifically for reading. Reading requires more light than other activities. By having a reading light, you can keep the rest of the light in your room muted while still having enough in one area to read comfortably. If you put a reading light next to […]



How to Read Military Maps

Military maps are used during land navigation exercises and daily military operations. The purpose of a military map is to allow a service member to find his way from one point to another using grid coordinates, terrain features and topographic symbols. Military maps are measured in meters. Although the military has largely converted to the […]



How to Read an Oral Thermometer

Taking temperatures using an oral (mouth) thermometer is not difficult, especially if you using a digital thermometer. Make sure the tip of the thermometer is wiped clean with an alcohol wipe to sterilize it. Depending on what type of digital thermometer you use, there should be a little button on the top that you touch […]



How to Read Tire Sizes

[IMG] http://img-aws.ehowcdn.com/640/cme/photography.prod.demandstudios.com/c9e60c38-893b-40bd-a13a-e526bfefde1b.jpg [/IMG] All tires have a size stamp on the sidewall. (Image: Falken Tire) A tire’s dimensions can be determined by reading the markings on the sidewall. An example tire size is 245/45R18, which tells us the width, sidewall height, internal construction and matching wheel diameter. Let’s take a closer look at the size […]



How to Read a Torque Wrench

Reading a torque wrench is very simple, as it have numbers that go down around the handle, and they can read in pounds or in metric measurements. Learn about torque wrench settings with help from a general contractor in this free video on using shop tools.



How to Use a Dwell Meter Reading

A dwell meter measures the amount of time that the points remain closed or “dwell together” when an engine is running. These specifications only apply to vehicles that were made using the old points/plug/condenser ignition. Modern vehicles that use electronic ignition no longer have points, so these steps are not applicable. Dwell figures for any […]