Observatoire de Kew : photographies du soleil, instruments magnétiques. portable Magnetometer, Kew pattern as arranged for deflection [fig. 1] ; portable Magnetometer, Kew pattern as arranged for vibration [fig. 2] ; Dip Circle, Kew pattern [fig. 3] ; Barrow’s Dip Circle with Lloyds apparatus (fig. 4) ; Foy’s Circle (fig. 5) (titre original)
![Observatoire de Kew : photographies du soleil, instruments magnétiques. portable Magnetometer, Kew pattern as arranged for deflection [fig. 1] ; portable Magnetometer, Kew pattern as arranged for vibration [fig. 2] ; Dip Circle, Kew pattern [fig. 3] ; Barrow’s Dip Circle with Lloyds apparatus (fig. 4) ; Foy’s Circle (fig. 5) (titre original)](https://bibnum.obspm.fr/files/large/b1ecb42faeee6ec7579481d1e0c9df29dd5b3973.jpg)