
Robinson cup anemometer by Munro
1926-1932
1926-1932
1920-1925
1919
1923
1830 (original); 1967 (model)
1926
1928
1920-1929
1922
1931
1932
1924
1927
1926
1922-1923
1922-1923
1922-1923
1922-1923
1921-1926
1925
1920-1929
1920-1930
1920-1930
1923
1924-1927
1921
1931
1920
Before 1932
1921-1931
circa 1920
1930-1931
1923
1925
1928
1924
1923
1921-1930
circa 1920
1927
1920
1932
1955; 1830
1925-1928
1927-1929
1931
1927
1930
circa 1930
1920-1925