Transcription: The instruments we were to take with us included 1. A centigrade thermometer by Eigl graduated up to 150 degrees. If the temperature ever went that high we would certainly be cooked. 2. A manometer which was worked by compressed air. This would show us the increase in atmospheric pressure as we went further underground. 3. A first-class chronometer made by Boissanas of Geneva and set to the Hamburg meridian. 4. glass. Five, two compasses to measure both positive and negative inclination. Six, two Ruhmkorf lamps which were very easy to carry and would provide us with electric light when we were ...
