Medicine - Institutions > Army health reports and medical documents > Scientific memoirs by officers of the Medical and Sanitary Departments of the Government of India > Number 38 - Preliminary report on the killing of rats and rat fleas by hydrocyanic acid gas > Preliminary report on the killing of rats and rat fleas by hydrocyanic acid gas
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18
Experiment III.
A small room of 830 cubic feet capacity was used. 340 grammes of 98 per
cent. potassium cyanide, equivalent to about 1½ ozs. of the salt to 100 cubic feet
air space, was decomposed outside the room. The resultant gas, calculated to
be about 4.38 cubic feet at 26° Centigrade was delivered into the room by means
of a fan. Exposure for 20 minutes.
| Details as to conditions under which the fleas were admitted to the action of the gas. |
Results of fumigation. | REMARKS. | ||
| (1) 10 fleas in a cotton bag wrapped in several layers of blanket and thick sheet. |
(1) All dead | In all these results the fleas were kept for two hours and looked at again—in no case did any flea show signs of life. |
||
| (2) 8 fleas in a bag at the foot of a box containing boots, deck- shies (copper vessels), and some clothing. |
(2) All dead. | |||
| (3) 9 fleas in a bag wrapped in a durree, blanket, and coat roll- ed tightly up. |
(3) 8 alive; 1 dead | Control fleas kept in bags in precisely the same conditions as those shown herein were found at the end of two hours to be all alive. |
||
| (4) 9 fleas in a cotton bag on top of a box. |
(4) All dead. | |||
| (5) 8 fleas in a cotton bag wrapped up in a durree and 3 blankets, fairly tightly rolled up—a pipe discharging gas was put at the mouth of the roll. |
(5) All dead | 4 cages, 2 with bran and 2 with sand at the foot, were placed on the floor. 20 fleas were put in each. After fumigation guinea-pigs were put three times into each box. No fleas were recovered, so presum- ably all were killed by the gas. |
||
| (6) 9 fleas in a cotton bag hanging 5½ feet from the floor. |
(6) All dead. | |||
| (7) Bag 'A' as in Experiments I and II, that is, 8 fleas in a cotton bag enclosed in a red blanket bag 5½ feet from the floor. |
(7) All dead. | |||
| (8) Bag 'B,' same as above, but two layers of blanket bags. |
(8) 7 fleas; all dead | In control cages guinea- pigs were put in; re- covered 21 out of 40 fleas from the 2 sand cages, and 19 out of 40 from the 2 bran cages. |
||
| (9) Bag 'C,' same as above, but three layers of blanket bags on the floor. |
(9) 8 fleas; all dead. | |||
| (10) 8 fleas in a test-tube on the floor. |
(10) 8 fleas; all dead. | |||
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| Description | 61 volume new series covers bacteriological research work from 1902-1913 by Indian Medical Service staff. Laboratory experiments are recorded in detail. Many are accompanied by illustrations showing microscopic views and features of plant and animal matter. (Calcutta : Supt. of Govt. Print., India, 1885-1901.) |
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| Description | 12 titles describe the health and sanitary conditions of the army in India. Lists British, European and Indian troops plus families of military personnel. 3 volumes of army regulations included. 73 volumes make up the Scientific Memoirs series, a journal by Indian Medical Service staff. |
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| Description | The Institutions collection consists of 106 volumes from British India, dating from the 1860's to the 1940's. Divided into reports on medical institutions, army health, and lock hospitals. Education of indigenous medical students and maintenance of troop health shown in annual reports and statistical tables. |
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| Description | The India Papers collection contains publications of the central (Imperial) Government and many Indian states. Most states came under British rule. Much of the collection dates from between the post-Mutiny re-organisation of the Indian Government and Indian Independence in 1947. Some items published in London by John Murray. |
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