EXAMPLES FROM THE WEB FOR HRS
Wash thoroughly, cover with warm water and let stand for from 12 to 48 hrs.
The times taken by a French steamer were as follows: 'Guinevere,' 10 hrs.
Although Cuthbertson won his wager, and walked down in 10 hrs.
Derricks were not needed as would have been the case with masonry piers, and colored labor at $1 for 11 hrs.
Let stand until bubbles appear in the batter, usually 2–3 hrs.
Set into covered baker or cover with waxed paper and bake until squash is tender which will be in 2–3 hrs.
It appears that any satellite situated at the outer edge of the ring would require as long a period as 13 hrs.