Frank Cossor
1870 Born in Islington, son of Alfred Charles Cossor, thermometer maker, and his wife Elizabeth
1891 Meteorological glass blower[1]
1901 Barometer and thermometer maker, employer, living in Islington with Florence E Cossor 29 and Elsie G Cossor 1[2]
1909 After his brother Alfred had left the family business to set up his own company, their father retired and Frank continued to run Alfred Cossor and Son on his own.[3]
1911 Scientific instrument manufacturer - thermometers, gauges, recording instruments, etc - employer, living in Finchley with Florence Edith Cossor 39, Elsie Gwendolyn Cossor 11, Frank Gordon Cossor 6, and a visitor, his brother Alfred Charles Cossor 49[4]
1922 scientific instrument maker[5]
1941 Died in Surrey[6]