28
Experiment XII.
Same room. 16½ ozs. of potassium cyanide (same salt as in Experiments
X and XI), 32 ozs. of sulphuric acid of specific gravity 1.83 and 64 ozs. of
water—about 1 oz. of KCN to 100 cubic feet of space. Exposure 50 minutes.
| POSITION. | RATS. | FLEAS. | REMARKS. | ||||||
| Dead. | Sick. | Alive. | Dead. | Alive. | |||||
| On the floor | 1 | 2 | 1 | 21 | ... | ||||
| 4 feet from floor | 2 | 1 | 2 | 9 | ... | ||||
| 6 do. | 3 | ... | 1 | 35 | ... | ||||
| 10 do. | 2 | ... | 1 | 16 | 2* | * These appeared dead on opening the godown, but recovered 3 hours later. |
|||
| Rafters | ... | ... | ... | 2 | 9 | ||||
| Ledge near open space between roof and smaller end wall. |
... | ... | ... | 7 | 2 | ||||
| Burrow A | Blind bur- rows. |
... | ... | 1 | ... | 6 (all) | For description of burrows, see page 12. |
||
| " B | ... | ... | 1 | ... | 9 (all) | ||||
| " C | Two way burrows. |
... | ... | 1 | ... | 9 (all) | |||
| " D | ... | ... | 1 | ... | 8 (all) | ||||
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