To determine if a lamp is an original Tiffany lamp, you would need to carefully examine the lamp for certain characteristics. Look for a signature from the Tiffany Studios, which was typically located on the base or shade of the lamp. Original Tiffany lamps were handcrafted with high-quality materials like stained glass and bronze, so check for these materials and intricate designs. Additionally, consider consulting with an expert or appraiser who specializes in Tiffany lamps for a professional opinion. **

The value of an original Tiffany lamp can vary greatly depending on factors such as its age, condition, design, and rarity. Some original Tiffany lamps have sold for hundreds of thousands or even millions of dollars at auction, while others may be worth significantly less. It is important to have an expert appraiser evaluate the specific lamp in question to determine its true value. **

The ending "yl" in chemistry typically indicates the presence of a functional group in a molecule. This functional group is often a substituent that is attached to the main carbon chain of the molecule. The "yl" ending is used to name these substituents and is derived from the name of the parent compound. For example, the "ethyl" group is a two-carbon chain attached to a larger molecule, and it is named as such because it is derived from the parent compound ethane. **

The "yl" in the carbonyl group stands for the alkyl or acyl group that is attached to the carbonyl carbon. In the case of an alkyl group, the "yl" represents a hydrocarbon chain, while in the case of an acyl group, the "yl" represents a hydrocarbon chain attached to a carbonyl group through a single bond. The "yl" designation helps to indicate the specific structure and composition of the carbonyl group. **

Yes, 31 is a positive number. In mathematics, a positive number is any number that is greater than zero. Since 31 is greater than zero, it is considered a positive number. **

The sizes YL, Small, Medium, and Large are typically used to indicate clothing sizes. YL stands for Youth Large and is generally for children around 12-14 years old. Small is usually for individuals with a chest size of 34-36 inches, Medium for 38-40 inches, and Large for 42-44 inches. These sizes may vary slightly depending on the brand and the type of clothing. **

Window 31 is a large, rectangular window located on the east side of the building. It provides ample natural light and a clear view of the surrounding area. The window is equipped with blinds that can be adjusted for privacy or to control the amount of sunlight entering the room. Overall, window 31 is a functional and aesthetically pleasing feature of the building. **

It is a puzzle or riddle where the number 31 is the subject. The answer could be anything related to the number 31, such as the 31st day of a month, the 31st element on the periodic table, or any other concept or item associated with the number 31. Without more context, it's difficult to determine the specific answer to "What is it? 31." **