Further preliminary reports on flies as carriers of infection.

Date:
1909
Catalogue details

Licence: In copyright

Credit: Further preliminary reports on flies as carriers of infection. Source: Wellcome Collection.

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    Flies conjined in “ Fly-balloon ” and fed on Sngar and Water. These flies ivere lightly sprayed with Shellac. Date. Mortality. Per cent. Remarks. 7th August ... 8 flies sprayed with alcohol and shellac and then dusted with rice -starch powder. 8th None — Colour very good. 9th „ 2 25 ?) JJ 10th None — nth „ 2 25 12th „ None 13th 2 25 14th „ None 15th „ 16th „ 17th „ 18th „ 19th 20th 2 25 n n Flies confined in Net Cages and fed on Sugar and Water. Aug. 10. Aug. 11 Aug. 12. Aug. 13. Aug. 14. Aug. 15. Aug. 16. Aug. 17 Aug. 18 Aug. 19. 20 flies (lusted with rice starch and sprayed with alcohol and shellac. 14 dead (70 per cent.). Colour good. 4 dead (20 per cent.). Colour good. 1 dead (5 per cent.). Colour good. 1 dead (5 per cent.'. Colour good. 20 flies dusted with rice starch and sprayed with alcohol and shellac. 1 dead (5 per cent.). Colour good. 13 dead (65 per cent.). Colour good. 1 dead (5 per cent.). Colour good. 1 dead (5 per cent.). Colour good. None dead. Colour good. 1 dead (6 per cent.). Colour good. 1 dead (5 per (cent.). Colour good. None dead. Colour good. 2 dead (10 per (cent.). Clolour good. 50 flies sprayed with Fuchsine and Alcohol. 12 dead (24 per cent.). Colour good. 16 dead (32 per cent.). Colour good. 8 dead (16 per cent.). Colour good. 5 dead (10 per cent.). Colour good. 3 dead (6 per cent.). Colour good. None dead. Colour good 6 dead (12 per (cent.). Colour good. 14th Aug. 15th .4ug. 16th Aug. 17th Aug. 18th Aug. 50 flies dusted with rice starch powder, sprayed with alcohol and shellac, and liberated in Pembroke College bakehouse. A few to be seen about. None about. None about. None about. 17th Aug. 18th Aug. 19th Aug. 20th Aug. 21st Aug. 22nd Aug. 100 flies well dusted with pink chalk and liberated in the Pembroke Col- lege bakehouse. Very many about. Very many about. Very many about. Not so many about. None about.