In one sentence, describe what the following article is about: Place your camera on a flat surface when you do this to get the straightest picture possible. Do your best to aim the camera at the "center" of the object. This will be the thing that you aim the camera at for your second picture. After you take the picture, measure the distance from the object to the camera. You may end up not needing this information, but it could be very helpful later. After you move the camera, turn it slightly so that it's focused on the "center" of the object again. Make sure you don't change the distance between the object and the camera; you just want to change the angle that the next picture will be taken from. If you want to be extra safe, measure the distance from the camera to the object after you move the camera. This way, you can make sure you only changed the angle and not the distance. You should only move the camera about 3 inches (7.6cm) because this is the approximate distance between the centers of your eyes. Make sure that the object hasn't moved or changed since you took the first picture. The second picture should look nearly identical to the first picture, but with some tiny changes. For instance, the smaller details in the image may seem to be "looking" into the distance relative to where they were "looking" in your first picture. This is the biggest that your pictures can be if you want to look at them with a simple stereoscope. For bigger pictures, you'd have to use a mirror stereoscope, which isn't as simple to make! You can also make your pictures smaller, if you want. They may just be a bit harder to see with your stereoscope. If you're using a digital camera, you can usually select this sizing option on the computer program that your camera uses. If you're using a film camera, ask the clerk at the camera store to print your photos to this size.
Summary: Take a picture of an object at a distance. Slide your camera about 3 inches (7.6cm) to the side. Snap another picture of the object from this new position. Print the 2 pictures to be 6 by 9 centimetres (2.4 by 3.5in) big.

Do not spend time in areas where mercury has been spilled until you are prepared to clean it up. Close all doors, windows, and vents leading to other rooms of the building, and open windows leading to the outside. Let everyone in the area know that the room is off-limits, or leave a sign on the door. Make special effort to ensure that children stay away. Only turn on a fan if you can blow the air to an outdoor window that does not lead to another residence. If possible, lower the temperature in the room to reduce the spread of the mercury vapor. If more than 2 tablespoons (30 milliliters) have been spilled, the spill should be handled by a professional when possible. This is about the size of a pea, or the amount in one mercury thermometer. If the spill is smaller, or finding a professional is not feasible, skip to the next step. Otherwise: Check your local yellow pages or search online for "Hazardous waste cleanup," "environmental engineers," or "engineering services" in your area that you could hire. If the mercury was spilled outdoors, phone our local, state, or national environmental response team. In the United States, call 1-800-424-8802. Wear rubber, nitrile, latex, or vinyl gloves whenever handling mercury. Wear old clothes and shoes, as you may need to throw them away afterward. Because mercury can react with metals, remove all jewelry and piercings, especially gold. If you do not have a spare pair of disposable shoes, put your shoes in sturdy plastic bags and fix them to your ankle with rubber bands. If you have safety goggles, put them on. This is not vital for cleaning up mercury spills smaller than a pea, but a large spill may require professional-quality eye protection. This is not necessary for small home spills, but if you do find a mercury cleanup kit at a hardware store, the powdered sulfur will make the task easier. This yellow powder turns brown in contact with mercury, making detection of small spills easier, and binds with the mercury to make cleanup easier. Begin by carefully picking up pieces of broken glass or other small objects that have come into contact with mercury. Place these in a disposable puncture-proof container such as a sharps container or glass jar. If no disposable puncture-proof container is available, instead place a zip-locked bag inside a second zip-locked bag, and fold all broken material inside a paper towel before placing in the bag. Leave tiny specks of broken glass alone for now. We'll handle them later. If the mercury has spilled onto an absorbent surface, you cannot save this material on your own. A trained professional may be able to help, but if you are cleaning up the spill at home, all you can do is cut out the affected area and discard it in a double trash bag. Never wash this material, as it can contaminate your washing machine or pollute the water or sewage system. Use index cards, small pieces of cardboard, or a disposable squeegee to slide beads of mercury along hard surfaces, pooling them into one location. To locate more mercury, dim the lights and hold a flashlight low to the floor, looking for glints. Mercury can scatter quite far, so check the entire room. Use an eyedropper to pick up the beads of mercury. Slowly squeeze each bead onto damp paper towel, fold the paper towel, and place it inside a zip-locked bag. Small beads of mercury or tiny pieces of broken glass can be picked up with sticky tape. Wrap the sticky tape around your gloves finger, with the sticky side out, then pick up the contaminants and place the tap inside a zip-locked bag. Alternatively, dab shaving cream onto a disposable paint brush and use the brush to pick up the mercury. Place the paint brush in the bag along with the mercury. Do not apply shaving cream directly to a mercury-contaminated brush. This includes shoes that walked over the contaminated area, clothing that mercury dripped on to, and any tools that came into contact with mercury. If possible, leave windows to the outside open for 24 hours after cleanup. Keep children and pets outside of the contaminated room during this time. In the meantime, continue to the next section for information on getting rid of your contaminated materials.
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One-sentence summary -- Leave the room while you plan. Call a professional for large spills. Put on gloves, old clothing, and old shoes, and remove jewelry. Sprinkle the area with powdered sulfur (optional). Place small objects and fragments in a puncture-proof container. Bag carpet, clothing, or other soft contaminated material. Locate and gather visible beads. Transfer the mercury with an eyedropper. Pick up tiny beads and shards. Bag all contaminated clothing and tools. Continue to ventilate to the outside for 24 hours.

Problem: Article: The first step when teaching your bird the step-up command is letting it out of the cage and having it sit on a hand. After it sits on your hand you will be able to use your other hand to start teaching it how to step up. Once your bird steps out of the cage, offer your hand to it as a platform. Move slowly and make sure your bird stays comfortable. The aim of the step up command is to have your bird step from one hand to the other. To do this you will need to bring your other hand up to the bird, offering a new platform for it to move up to. Keep some of the following tips in mind as you work with your bird: If your bird bites, move your hand in from underneath the bird. Bring your hand up to the area just above where your bird's legs meet its body. Keep your hand flat and level. Whenever your bird steps up successfully you can offer it a reward. Giving your bird a tasty treat will help it understand that stepping up onto your other hand will result in rewards. Always offer a reward when training your bird to step-up in order to get the best results. Try to give your bird their favorite treat as a reward. Many birds love fresh vegetables, fruits, or seeds. Without enough training your bird may forget the step-up command or never properly learn it in the first place. Whenever your bird is feeling comfortable you should try working with it, spending time with it, and reinforcing the step-up command to build even more trust.
Summary:
Let the bird sit on your hand. Bring your other hand up to the bird. Reward the bird for stepping up. Practice often.