Kammala wannan jumla: An ba da Coats Observatory tare da nau'ikan kayan aikin kimiyya don lura da sararin dare da yin bayanan yanayi. A cikin 1900 an shigar da kayan aikin sa ido na girgizar ƙasa don yin rikodin girgizar ƙasa. Coats Observatory yana daya daga cikin tashoshin a fadin duniya wanda ya rubuta 1906
Girgizar ƙasar San Francisco.