Oak-Rhind, Hugh 7/13; 10/12
  'Where are the Clay Tobacco Pipes?' 8/4-6
Oakes, James Ltd 7/14
Octavius, Robert, of Rushden, Nhants 13/23
Odell's ironmongers, Stony Stratford 7/13
Odense, Denmark, meeting to establish International Molinological Society
    14/10
Ogden, D., Warwickshire millwright 8/7, 8; 9/8
Ogg, David, Northampton iron founder 12/5
oil cake manufacture, Buscot Park, Oxon 6/3
oil engines
  Fenny Stratford Post Office Repeater Station 2/4
  Ruston & Hornsby Akroyd type 13/3
  in watermills: Bugbrooke, Nhants 12/22; Potterspury, Nhants 12/33
Old, Nhants
  brewery 14/17, 23
  windmills 12/13, 16-17
Old Stratford, Nhants
  brewery 14/17, 23
  Dunchurch turnpike 7/4
  wharf on Grand Union Canal 6/4, 5
Oldfield Farm and Mill, Buscot Park, Oxon 6/3, 4; 7/3
Oldham, Thomas, of Towcester; 'Oldham Specific' veterinary medicine 7/9
Oldham & Co, mineral water manufacturers, Rushden, Nhants 12/40
Oliver, Fred, of Fawler, Oxon 16/11
Oliver, John, miller of Foxley, Nhants 12/26
Oliver (later Markham) of Chesterfield; horizontal steam engine No.106
    11/28
Olney, Bucks
  medieval pottery clamps and kiln 3/2
  watermill 5/5
omnibus services, Towcester-Blisworth 7/5
Ordnance, Board of 12/4
organisation of industrial archaeology, national 7/1-2; 11/3-4
organs, Marenghi fairground 6/12
Orland, Edward, miller of Teeton Mill, Nhants 12/35
Orland, J. and Ann, millers of Holdenby, Nhants 12/28
Orlingbury, Nhants
  brickworks 13/21
  dovecote 9/12
  watermill 12/32
  windmill 12/13, 17
O'Rourke, Richard G.
  'Engines at George Barker & Co. Ltd., Countess Road, Northampton' 16/11,
      13
  'G.T. Law & Son, Rugby Boot Makers, Towcester' 15/8
  'The Industrial Archaeology of Towcester and District' 7/4-9
  'Some Northamptonshire Brickworks' 13/8-27; 16/1A
  on Tingewick Mill 9/9; 11/13-14
  on Towcester gasworks 9/11
  and Wroxton quarries, Oxon 3/3
Orton, Alfred, miller of Dallington, Nhants 12/24
Orton, Nhants
  brickworks 13/21; 14/30
  watermill 12/32
Otto & Langen gas engine 11/10
Oundle, Nhants
  breweries 13/7; 14/17, 23-4
  brickworks 13/11, 21
  cast iron mileposts 9/11
  Roman ironworking 11/17
  watermills 12/21, 32
  windmill 12/13, 17
outworkers, Northampton boot and shoe industry 11/7
oven, 'faggot', Padworth Common, W. Berks 16/7-8, 7
Overstone, Nhants; watermill 12/32
Owen, Thomas, apprentice clay pipemaker of Stony Stratford 8/6
Owens, W.H.; 'The Waterways Museum at Stoke Bruerne' (reviewed) 9/17
Oxendon, Nhants; windmill 12/13, 17
Oxford
  breweries 15/2, 3; college brewhouses 15/4; Morrells Lion Brewery 4/2;
      9/15; 15/2, 3
  City & County Museum 8/18; 9/18; 13/33; Woodstock Study Group 7/16; 8/17;
      9/17; 10/11, 20; 15/15
  horsewheel 4/2
  Salter Brothers boat yard 15/14-15
  13th-century leatherwork 15/15
  University Industrial Archaeology Group 15/14-15
Oxford, Worcester and Wolverhampton railway 16/8
Oxford Canal 9/17; 13/11
Oxford and District Gas Company 8/18
Oxfordshire Ironstone Company 3/1, 3; 5/4; 6/17; 10/16