2- https://doi.org/10.1243/pime_proc_1907_073_010_02
Portable Pneumatic Tools
- Jun 1, 1907
- Proceedings of the Institution of Mechanical Engineers
- Herbert Bing
Abstract
Cost per day : eight men at 98. 3d. . . 3 14 0 Cost for the 6 days . ., . .22 4 0With two pneumatic hammers.-Fourmen employed, two using the pneumatic hammers and two their hand tools, the same job taking but three days.& 8. d.Cost per day : four men at 9s. 3d. . . .
