Article: You can purchase one of these kits through a jewelry tool supplier. The kit will contain all of the materials that you’ll need along with a set of detailed instructions. Make sure to read the instructions carefully before beginning and conduct an inventory of the supplies before starting. These kits can be quite affordable, if ordered online. They start at around $30. Your kit will contain a number of needles that you’ll use for testing different types of gold. Look for a karat value marking on the side of the needle. Each needle will also have a colored gold sample at the tip. Use the yellow needle for yellow gold and the white needle for white gold. Turn the piece around until you find a less noticeable spot. Hold an engraving tool firmly in your hand and make a small divot in the metal. The goal is to expose the deeper layers of the metal. Since you are working with acid, it’s important to don thick, but fitted, gloves. Eye protection is also a good idea, just to be extra cautious. Avoid touching your face or your eyes while working with the acid. Select the proper needle for the gold type. Then, hold the needle tip directly over the notch. Push the plunger of the needle down until a single drop of acid drops into the divot. Look closely at the divot that you made earlier and where you just applied the acid. The acid will react with the metal and may turn a particular color. Generally, if the acid turns a green color, this indicates that the piece is not pure metal, but instead gold plated or another metal entirely. Since testing kits have different color indications, make sure to read the color guide carefully as you interpret the test results.
Question: What is a summary of what this article is about?
Buy an acid testing kit for a more precise estimate of gold karat purity. Inspect the needles for karat value labels. Make a notch with an engraving tool. Put on protective gloves and goggles. Place a drop of acid on the notch. Read the results.
Article: Click the magnifying glass-shaped icon in the top-right corner of the screen. Doing so searches your Mac for the Activity Monitor program, which allows you to review and quite high-memory programs. This option is in the Spotlight results. Doing so opens Activity Monitor. It's at the top of the Activity Monitor window. Click a high-memory program to do so. Make sure you don't select a program which you're currently using (e.g., your browser). It's in the upper-left side of the window. Clicking Quit will allow the program to attempt to create a recovery save if you have work open, while clicking Force Quit will immediately close the program in question. Click the Apple logo in the upper-left side of the screen. A drop-down menu will appear. It's in the drop-down menu. Doing so opens the System Preferences window. You'll find this option in the System Preferences window. Click your username on the left side of the window. It's a tab at the top of the window. Uncheck any item's box on this page to disable the item at startup. You may have to click the lock icon in the bottom-left corner of the page and enter your password before you can edit this menu.
Question: What is a summary of what this article is about?
Open Spotlight . Type in activity monitor. Double-click Activity Monitor. Click the CPU tab. Select a program to quit. Click X. Click Quit or Force Quit when prompted. Open the Apple menu . Click System Preferences…. Click Users & Groups. Select your name. Click Login Items. Disable startup programs.
Article: If you’re in the Southern Hemisphere, the North Star won’t help you navigate. Instead, find true south using the Southern Cross constellation. This constellation is always visible in the Southern Hemisphere. The constellation is made up of 4 bright stars that form a kite shape if you trace the border around them. Outside the Southern Cross are 2 more bright stars known as the pointers. These are roughly parallel with the 2 stars in the Southern Cross that are closest together. The pointer stars are some of the brightest in the Southern Hemisphere. If you're having trouble finding the Southern Cross, locating the pointer stars is a good starting point. Two stars in the Southern Cross, Gacrux and Acrux, are the furthest apart in the constellation. Starting at the top, imagine a line extending between these 2 stars, and then continuing at the same angle outward.  Hold a strong or a straight stick out in front of you to help envision a straight line. Depending on the time of year, this line may hit the ground since the constellation rotates along with Earth. The same way you drew an imaginary line from the Southern Cross, now find the midpoint between the pointers and extend a line outward. This line should intersect with the line you drew from the Southern Cross. That intersection point is true south. Use a natural landmark as a reference point. For instance, a tall tree in the distance could mark the intersection between the 2 lines, indicating where true south is. When you locate true south, it’s simply a matter of turning around to find true north. Make sure you rotate exactly 180 degrees, or you'll be off-center and not facing true north.
Question: What is a summary of what this article is about?
Locate the Southern Cross constellation. Find the pointer stars. Draw an imaginary line down from the longest angle in the Southern Cross. Draw an imaginary line from the midpoint between the pointers. Turn around 180 degrees with your back facing south to find true north.