when you've located what you believe to be the center of the studs, confirm the stud locations and find both edges by probing with a nail (photo 2).

How would the previous sentence be correctly capitalized?
Answer: When you've located what you believe to be the center of the studs, confirm the stud locations and find both edges by probing with a nail (Photo 2).
cut the thread and pull through remaining sts. sew tight.

How would the previous sentence be correctly capitalized?
Answer: Cut the thread and pull through remaining sts. Sew tight.
as privates of the industrial army they are placed under the command of a perfect hierarchy of officers and sergeants.

How would the previous sentence be correctly capitalized?
Answer: As privates of the industrial army they are placed under the command of a perfect hierarchy of officers and sergeants.
its outer area is marked off into 37 (in europe) or 38 (in the united states) spaces, each of which has retaining walls so that a small ball may come to rest in one.

How would the previous sentence be correctly capitalized?
Answer: Its outer area is marked off into 37 (in Europe) or 38 (in the United States) spaces, each of which has retaining walls so that a small ball may come to rest in one.