Osmotic shock data presented in Figure 2 and 3 of the paper: "Osmotaxis in E. coli through changes in motor speed" (in press). These are raw (X,Y) voltages from the position sensitive detector as decribed in the Methods section of the paper.Dataset contains 69 .zip archives, each containing a single cell (single motor) rotation measurement. A single measurement contains 120 or more text files ordered chronologically, in order of an ascending integer count.