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- Positions for the use of the sword
- Plan of a Behr Mono-Railway Car
- Piano
- Pennsylvania, 35 H.P. Pennsylvania Auto Motor Co., Phil., Pa.
- Pedrail cimbing stairs
- Pedrail
- On guard
- Octave Chanute experimenting with his gliders on the Michigan sand dunes
- Norman Crossbowmen
- Near Side protect and Giving Point
- Mr. Higginson’s Transfusion Instrument
- Mr. Daniel Bourn’s Roller Wheel Waggon -1763
- Mounted Crossbowman
- Mounted Crossbowman, with Cranequin crossbow, and a quarrel in his hat
- Modern method og grand pianoforte case construction
- Model of Roman Catapult
- Mississippi steamboat ‘J. M. White,’ 1878
- Miller’s twin boat on Loch Dalswinton, 1788
- MG 34 on tripod mount
- Method of removing receiver of M.P. 40 from barrel and from magazine hosing
- Method of carrying and packing stick-type grenades
- Marion Model 7, 22–24 H.P
- Map of Tank Operations, August–November, 1918
- M249 Machine Gun exploded view
- M249 Machine Gun
- M249 5.56 mm Machine Gun
- M.G. 42, showing method of operating barrel extension
- M.G. 42
- London Hackney Cab (Boulnois’ Patent)
- Locomotive of To-day
- Leonardo da Vinci's Glider and Parachute Idea
- Left view of 8-cm mortar, model 34
- Left side of 5-cm mortar
- Lamont Harp
- King George IV. in His Pony Phaeton
- Kimpton-Brown Tube
- Jonas Chickering’s full solid cast grand metal plate
- Jewish Shophar
- Iron plate for upright pianoforte with Agraffes (Mehlin patents)
- Iron plate for upright pianoforte fitted with Capo D’astro bar
- Hunters with crossbows
- Hunters with crossbows
- Horse-boat at Empy’s Ferry, Osnabruck, Ontario
- Horse Litter
- Hill Touring Car, 35 H.P
- Hercules, Model 144
- Hercules, Model 139
- Hercules, Model 128
- Hercules, Model 121
- Hercules, Model 120
- Hercules, Model 113
- Hercules, Model 106
- Hercules, Model 103
- Hercules, Model 102
- Hercules, Model 101
- Hercules, Model 140
- Hammock Waggon
- Hackney Coaches in London, 1637
- Grand pianoforte action with metallic action and damper frames
- Going to Bury Fair