| Specimen designations were etched on discs with a vibrating scriber. |
| On the scriber is placed the zero mark which shows at a glance the measurement that is being taken. |
| A scriber is a piece of steel wire having a hardened sharp point wherewith to draw lines. |
| A knurled locking nut is also provided for holding the scriber in any fixed position. |
| Chewing the scriber and needling his brain, he slowly built up a list of other possibilities. |
| The scriber point engraves the fluctuating pressure onto the reverse side of the waxed indicating paper roll. |
