71. IOR/V/26/640 Reference (shelfmark): IOR/V/26/640 Title: Chemicals and Engineering Collection Area: India Office Records and Private Papers Languages: English Date Range: 1920-1940 Extent: 2 volumes
72. IOR/V/26/641 Reference (shelfmark): IOR/V/26/641 Title: Boilers Collection Area: India Office Records and Private Papers Languages: English Date Range: 1921-1921 Extent: 1 volume
73. IOR/V/26/650 Reference (shelfmark): IOR/V/26/650 Title: Protection and Tariffs Collection Area: India Office Records and Private Papers Languages: English Date Range: 1920-1923 Extent: 5 volumes
74. IOR/V/26/660 Reference (shelfmark): IOR/V/26/660 Title: Trade Collection Area: India Office Records and Private Papers Languages: English Date Range: 1793-1949 Extent: 6 volumes
75. IOR/V/26/670 Reference (shelfmark): IOR/V/26/670 Title: Labour Collection Area: India Office Records and Private Papers Languages: English Date Range: 1875-1949 Extent: 96 volumes
76. IOR/V/26/700 Reference (shelfmark): IOR/V/26/700 Title: Public Works and Communications: General Collection Area: India Office Records and Private Papers Languages: English Date Range: 1858-1937 Extent: 9 volumes
77. IOR/V/26/710 Reference (shelfmark): IOR/V/26/710 Title: Roads and Road Traffic Collection Area: India Office Records and Private Papers Languages: English Date Range: 1845-1941 Extent: 10 volumes
78. IOR/V/26/720 Reference (shelfmark): IOR/V/26/720 Title: Railways: General Collection Area: India Office Records and Private Papers Languages: English Date Range: 1876-1948 Extent: 13 volumes
79. IOR/V/26/722 Reference (shelfmark): IOR/V/26/722 Title: Railways: Projects and Construction Collection Area: India Office Records and Private Papers Languages: English Date Range: 1899-1932 Extent: 6 volumes
80. IOR/V/26/723 Reference (shelfmark): IOR/V/26/723 Title: Railways: Equipment and Rolling Stock Collection Area: India Office Records and Private Papers Languages: English Date Range: 1922-1955 Extent: 44 volumes