Six Twaddell hydrometers by J W Towers, Widnes. Lead weights and paper scales. In wood box, possibly teak. No.1 equals range 0 - 24, No 2. equals range 24 - 48, No 3. equals range 48 - 74, No 4. equals range 74 - 102, No. 5 equals range 102 - 138 and No. 6 equals range 138 - 170.
Details
- Category:
- Experimental Chemistry
- Object Number:
- 2005-442
- type:
- hydrometer
- credit:
- Laboratory of the Government Chemist