Photographs
c. 1871
1868
Cinematography
1870
Gas Industry
1879
c. 1880
Oceanography
1869
Mathematics
1876
Heat
1880
Optics
1878
1877
1873
Textiles Machinery
1870-1880
Telecommunications
1875-1880
Anaesthesiology
1865-1875
Astronomy
1865
1872
ca. 1865
Heat Engines (non steam)
Railways
c. 1875
1871
Electricity and Magnetism
Road Transport
Navigation
Experimental Chemistry
1875
Agricultural Engineering
1874-1876
Miscellanea & Curiosities
Printing & Writing