EXAMPLES FROM THE WEB FOR HOURGLASS
The marble was but roughly hewn, in lines that held the suggestion of an hourglass.
There is a good oak pulpit, with hourglass holder, and some heavy 15th-cent.
To calculate it one must reckon a century for every turn of the hourglass.
At the sound the bearded old man raises his sceptre, opens his mouth, and turns an hourglass.
I think an hourglass running out would help the notion; perhaps her little tilings upon his knee, or in his hand.
The latter had an hourglass on his head, and in his hand a scythe, with which he aimed a blow at Mercury's feet.
The hourglass figure can of course be construed as the "filled-in angle" enlarged.
It seems to refer to paired crossing lines as part of hourglass figures.
Sometimes it will be nearly globular, again long and thin, or it may be constricted like an hourglass.
All refused to answer her inquiries, but one of them, with a sinister smile, placed the hourglass and skull beside her.