1poe really was the inventor of the detective story, which he called the "ratiocinative" tale. 2 here believing the effect intended was "to perplex the reader and whet his desire for elucidation," he originated two devices useful to this day. 3 one might be called "the device of the baffled friend": he gave his brilliant detective a companion not good at solutions and had him tell the story. 4 viewing the happenings through this narrator's eyes, the reader shares his growing puzzlement. 5 poe used his second device at the tale's end: he had the detective disclose his surprising solution and then "elucidate" step by step the reasoning which led to it. 6 "the purloined letter" demonstrated poe's use of these two devices in a detective story.
(from: united states in literature by walter blair, paul farmer, theodore hornberger, and margaret wasson. c. 1963 by scott, foresman and company. reprinted by permission.)
identify and translate the prefix for the word elucidation in sentence 2.
prefix:
meaning:

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)

the best practice

1. keep your workspace clean

2. wash your hands

3. seperate and clean chemicals and equipment

4.   use microfiber cleaning utensils

5. clean and sanitize all work surfaces

hope this !

what is margin again? i’m confusion