No. 125 means that the subject is treated continuously on the pages mentioned; but it may not occupy all of pages 25 and 27.
No. 125-1 means that the subject is referred to on each of the pages numbered, but not to the exclusion of other matter.
In No. 125-2, in order to save space, the comma takes the place of “and” between two numbers, just as the dash takes the place of “to” between “25” and “27” in No. 125. Such omission of “and” is found in the text only when the figures are enclosed in parentheses; but it is common without the parentheses in foot-notes, tables, and indexes.
In No. 125-3 we use “to” instead of a dash. “To” is generally used when a considerable number of pages is named. No definite rule can be given for such usage.
An apparent exception to the interpretation of the numbers in No. 125 is not infrequently found in the manner of writing the street numbers of a building, especially as found on letter-heads:
126. John Smith & Co.
25-27 Water Street
Chicago
As buildings on one side of a street take the odd numbers, and on the other side the even numbers, we know that John Smith & Co. are located at 25 and 27 Water Street.
An accepted form of shortening an address which contains the words street and avenue is to write “avenue” first with its number expressed in words, followed by the street with its number in figures:
127. He resides at the corner of Tenth Avenue and 52d Street.