Telecommunications
1878
Photographs
Therapeutics
Civil Engineering
Classical & Medieval Medicine
2050-1750 BCE
Astronomy
Mathematics
2000-1350 BCE
Building Construction
2000-1001 BCE
Locomotives and Rolling Stock Components
Road Transport
Ethnography and Folk Medicine
1880-120
1991-1786 BCE
Industrial Metrology
Weighing & Measuring
Obstetrics, Gynaecology & Contraception
1901-950
Heat
Textiles Machinery
c. 1878
Railway Shipping
Metallurgy
before 1878