Suffix [edit]. -en. 1  Suffix for definite form singular of many common gender nouns, in particular those which end in a consonant or a stressed-i; see also-n. 2  Suffix for definite form plural of neuter nouns ending with consonant.
Events Leading up to Heliograph When NiÃ©pce first began working with his son who would draw the images they used in lithography because NiÃ©pce could not draw well. During that time the camera obscura was only used as a guide for drawing. This collaboration stopped when his son was drafted into the army and went to fight in the Battle of Waterloo.
The Invention of the Polygraph. The lie detectorâor polygraph machineâwas first created by John Augustus Larson (1892-1965), a part-time employee of the Berkley Police Department who was earning his Ph.D. in physiology at the University of California at Berkeley.