div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: chairs of physical and experimental me- chanics mathematical physics calculus of probabilities mathematical astronomy and celestial mechanics He also taught general astronomy src=https:reader035fdocumentsusreader035viewer20220707235f01f6387e708231d401e41bhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: chairs of physical and experimental me- chanics mathematical physics calculus of probabilities mathematical astronomy and celestial mechanics He also taught general astronomy src=https:reader035fdocumentsusreader035viewer20220707235f01f6387e708231d401e41bhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv