Final answer:
The description of Mr. Fruitlands in the passage serves to emphasize his eccentric behavior rather than his scientific knowledge, dedication, or artistic abilities.
Step-by-step explanation:
The description of Mr. Fruitlands as being absorbed in solar experiences and collecting the sun's rays with a burning-glass is a metaphorical way to illustrate Mr. Fruitlands' eccentric behavior. The passage doesn't emphasize his scientific knowledge, dedication to the community, or artistic abilities.
Instead, it portrays him as a character whose actions are peculiar and out of the ordinary, possibly suggesting he is more engaged in his own fanciful pursuits than practical or communal concerns.