The application seeks funding to purchase a Leica M165 FC Fluorescence Stereomicroscope and associated accessories, together with a camera, a computer and imaging software. The entire package is essential for our proposed research in dissecting mechanistically how various proteins that we have identified function to regulate the BMP signaling pathway. It will improve our efficiency and throughput in body size measurement, the major output of BMP signaling in C. elegans, and will significantly increase our research productivity.