- Leatherback turtle
- Leathern Apron
- Lee Leaving Appomattox
- Lee Simonson
- Left Foot
- Left Hand
- Left Hand holding a card
- Left hand pointing
- Left Hand Pointing - Fine detail
- Left Hand Pointing Coarse detail
- Left hand stigmata of the larvæ of muscoidea
- Left Handed use
- Left side of 5-cm mortar
- Left spiracle of nymph of Argas persicus
- Left view of 8-cm mortar, model 34
- Leg of a Horse Compared with that of the Giant Moa
- Legend of the Jew of the Rue des Billettes, Paris, piercing the Holy Wafer with his Knife
- Legoean
- Leiden, Rhijnland (dated 1612)
- Leigh Hunt
- Leigh Hunt
- Lemming
- Lemon
- Lenormand’s parachute, 1784
- Leo
- Leodice sanguinea
- Leon M Gambetta
- Leonardo da Vinci
- Leonardo da Vinci's Glider and Parachute Idea
- Leonardo Da Vincis diagram of the heart
- Leonhard Keyser on the way to execution
- Leonore Ulric
- Leopold Stokowski
- Leper giving thanks
- Lepismas at Work
- Let the mathematics professor demonstrate the lesson for us
- Let the mathematics professor demonstrate the lesson for us
- Lets go skating
- Lets Stick to Solid Foundations
- Letter to Mr Raymond
- Letters
- Letters for post
- Letting his feet breathe
- Leucadendron Stokoei
- Leucadendron Stokoei
- Leupold's Engine
- Levee and Great Bridge at St. Louis
- Lewis Waller as Henry V
- Lexington
- Libra
- Library of the University of Leyden, in which all the Books were chained, even in the Seventeenth Century
- Lietenant Colonel, Cavalry
- Lieut. Cushing’s Torpedoboat Sinking the Albemarle
- Life cycle of the malarial parasite
- Life in an Earth Lodge
- Life in the Early Palæozoic
- Life in the Later Palæozoic Age
- Life in the Primordial Sea
- Life of the Virgin - excert from Durer etching
- Lifting Insensible Man