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.
John Larson the inventor of the lie detector or polygraph first started as a medical grad at California University.This invention first was a failure by James Mackenzie in 1902, but when John Larson advanced this invention he changed what the machine studied.f the person lied the persons amount of stress produced changes and the needle records a jump in the person's heart rate on the paper it is writing on. This invention first was a failure by James Mackenzie in 1902, but when John Larson advanced this invention he changed what the machine studied.