In one sentence, describe what the following article is about: Place the coin between your thumb and first two fingers. You want to be holding the coin on the ridged sides.  Make sure your entire hand is slightly tilted towards you. Spectators should be able to see the face of the coin easily, but turning your hand to you will make the trick easier. Use a larger coin, especially if you are a beginner. A quarter or half dollar works well. You can hold the coin in whichever hand feels more comfortable. For the purpose of explaining the trick, the coin will be in the left hand.
Summary: Hold the coin in your left hand.

In one sentence, describe what the following article is about: When questions and conflicts arise in the relationships between sovereign nations, they are solved under the rules of public international law. This body of law consists of the treaties and legal decisions interpreting those treaties.  International law assumes that all the parties, as sovereign states, are equals. Conflicts arising under public international law can be settled either through diplomatic negotiations or in the International Court of Justice. This is the court of the United Nations. Fifteen judges, elected by the UN General Assembly, use international legal precedent to issue advisory opinions and solve legal disputes between governments.  The International Court of Justice has jurisdiction in two types of cases. The first is where the two countries agree to submit the conflict to the court. The second is when a treaty specifies the court as the legal authority over disputes. When citizens of different states have a legal dispute, there is often a question about what law applies. This choice of law question in civil issues, ranging from contracts to family law, is discussed in the Hague Conference on Private International Law. In general, courts will first defer to any contract or agreement clauses that identify what courts will have jurisdiction. In the absence of explicit choice of law language, the court will look to the overall circumstances of the contract, the behavior of the parties in creating the contract (called parol evidence) and if the parties can agree on jurisdiction. The customary international law is codified in the Vienna Convention on the Law of Treaties. Under this custom, states consistently adhere to certain practices out historical and legal obligation.
Summary: Understand the concept of public international law. Differentiate private international law from public. Review the sources of international law.

In one sentence, describe what the following article is about: You can help prevent a buildup of dust and grime on your fan by attaching an air filter to it. Look for a filter that is designed to fit the size and shape of your box fan online or in a home supply store. Make sure to attach the filter to the rear part of your fan, where the air is drawn in.  If you like, you can also construct your own DIY filter and attach it to the front of your fan, allowing it to do double-duty as an air purifier. For example, if you have a 20 in (51 cm) box fan, purchase a 20 in (51 cm) by 20 in (51 cm) MERV 11 furnace filter and attach it to the front of your fan with some heavy-duty tape. Accrued dirt on fan blades cause bearings to become worn out, which creates a lot of noise from the fan. Every 2 weeks, you should vacuum the fan with the crevice-cleaning hose attachment. Wipe down the blades with a damp sponge twice a summer. In addition to causing damage to the fan, dust and dirt built up on the blades can blow into your home, reducing the air quality inside. Box fans do an amazing job keeping the house cool, but oftentimes they also cause a lot of noise. Look for looseness in the fan’s housing and fan guards.  Wedge a piece of cardboard between the edges of the blade guards if they are not firmly attached to the fan and their looseness is causing a rattle.  Add a drop of silicone sealant to secure the decorative cap to the front guard of the fan if it is too noisy. Inspect blades to make sure there aren’t any cracks, and replace them as necessary. Screw the spinner further into place and tighten it if it seems too loose. This will tighten the fan hub to the shaft and simultaneously secure the spinner into place. If you notice that the box fan makes noise on level or smooth surfaces instead of on cushioned surfaces, it might be an issue with its base. Pads might be missing, so inspect the base of the fan and replace its pads as needed.
Summary:
Buy an air filter for your fan. Clean fan blades of accumulated dirt regularly. Inspect the box fan to make sure that there are no loose external parts. Disassemble the box fan to see if there are any loose internal fasteners if the problem persists. Quiet any rattling the box fan might make.