Auto emailing updates within the last hour

I'm stumped.

I have several users in the field updating a sheet (by using a form on their phones) throughout the day. Approximately 20 entries AN HOUR.

I need to send out an automatic email update to the managers every hour of ONLY THE NEW RECORDS from the previous hour.

For the life of me, I cannot figure out how to get ONLY the last hour's entries to auto email. I can get an auto email of the whole sheet since the beginning of time (but way too much data to scroll through to see the end), I can get 1 new entry update per email (but emails too frequently and very annoying to see only 1 at a time).

How can I just send an email of all of the previous hour's updates only?


Thanks.

Answers