Title: Bottom ring of 200″ telescope tube on boring mill. Drilling holes in bottom faces.
Date: 1937-02-08
Original Format: photograph: print
Description: Work was done at Westinghouse Electric Plant.
Agent Subjects: Palomar Observatory
Topic Subjects: Astronomy
Collection: Photograph Collection
Series/File: Academic Divisions
Caltech Archives ID: 10.17.1-24
