The document describes the Soxhlet apparatus, which is used for extracting compounds from solids using a solvent. It discusses the key parts of the apparatus including the still pot, distillation path, thimble, siphon top, and condenser. The working principle involves heating the solvent to its boiling point, causing it to vaporize and condense on the thimble containing the solid sample. When the extractor fills, it siphons the now extract-containing solvent back to the still pot. This cycle repeats until the solid is fully extracted. The document notes advantages like high extraction efficiency but also disadvantages like long extraction times and large solvent usage. It also discusses automated Soxhlet methods that reduce extraction times and comparisons