| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
Hardcover published 1906 by Longmans, Green, and Co., no jacket, but in a removable plastic sleeve. The boards are clean and square, the spine sunned. Contemporary name and date to first end-paper, that is lightly tanned and foxed, as are the latter pages. "South African Science Series" title to front board.
