Description | Consisting of ten books: 'Chronometer time book' 'Optical phenomena' 'Monthly means' 'Chronometer corrections' 'Normal la cour time book' 'Insensitive la cour time book' 'Manual for a Dobson photoelectric spectrophotometer for measuring atmospheric ozone' 'Generator shed hydrograms' 'QHM comparisons' and a notebook of assorted data readings. |