each bug is given a number, and is kept on file until it is marked as having been dealt with.

How would the previous sentence be correctly capitalized?
Answer: Each bug is given a number, and is kept on file until it is marked as having been dealt with.
the lighthouse sends out three signals every 20 seconds. the lamp is 55 m above the surface of the ocean and can be seen 40 km from the coast at the end of the horns rev reef. initially, the lighthouse was manned with one lighthouse keeper, two lightsmen and one assistant.

How would the previous sentence be correctly capitalized?
Answer: The lighthouse sends out three signals every 20 seconds. The lamp is 55 m above the surface of the ocean and can be seen 40 km from the coast at the end of the Horns rev reef. Initially, the lighthouse was manned with one lighthouse keeper, two lightsmen and one assistant.
when farkas bolyai was offered a job at the calvinist college in marosvasarhely he was rather reluctant to accept but his father, wanting his son to have a secure job, pressed him to accept. bolyai taught mathematics, physics and chemistry at marosvasarhely for the rest of his life.

How would the previous sentence be correctly capitalized?
Answer: When Farkas Bolyai was offered a job at the Calvinist College in Marosvasarhely he was rather reluctant to accept but his father, wanting his son to have a secure job, pressed him to accept. Bolyai taught mathematics, physics and chemistry at Marosvasarhely for the rest of his life.
stir constantly in them.

How would the previous sentence be correctly capitalized?
Answer: Stir constantly in them.