Physicians use the local temperature of the skin as an indicator of underlying inflammation. U.S. Patent 3,570,312, “Skin Temperature Sensing Device” by F. Kreith, March 16, 1971, describes such a device. It utilizes a small thin-walled tube with a thermocouple or thermistor at the end. In order to obtain reproducible results, it is necessary to exert the same pressure on the skin with repeated measurements. Design a skin-temperature sensing device that is no larger than a pencil and can be stored in a pocket alongside a pen. Select an appropriate thermocouple or a thermistor from available literature and devise a means of exerting repeatable constant pressure with the device. Also estimate the possible error that ensues because heat is lost from the outside of the cylinder after an equilibrium temperature between skin and sensing device has been established. For experience with this device, you can consult by F. Kreith and D. Gudagni, “Skin Temperature Sensing Device,”