1
vote
1answer
189 views

When were st, nd, rd, and th, first used [closed]

When were numeric contractions for ordinals first used, as in 1st, 2nd, 3rd, 6th instead of first, second, third, sixth?
0
votes
0answers
62 views

Should a sentence ending with “Ph.D.” end with one or two periods? [duplicate]

Should a sentence ending with the word Ph. D. end with one or two periods? He has a Ph.D. He has a Ph.D.. Is there some established formatting rule for this situation? It might be a ...
4
votes
2answers
268 views

“E.g.” or “e. g.” (with a blank)?

What is the correct form, and why, in scientific papers (US English)? e.g. e. g.