"A 3D model of a large, rectangular, floor-to-ceiling wooden bookshelf for a 19th-century Parisian laboratory. The wood is dark, heavy, and unpolished, showing signs of significant age and wear with scuffs, scratches, and a faded, dull patina. It features multiple sturdy, fixed shelves (at least 5-7 visible shelves) filled with tightly packed, old, leather-bound books of various sizes, scientific journals, and perhaps a few small, antique scientific instruments or specimen jars. The overall impression is one of being overstuffed and well-used, almost sagging under the weight, blending into the damp, aged aesthetic of the room."