122 
RErOHT OF TUAVEELING PATHOLOGIST AND PKOTOZOOLOGIST 
compared with the comfortable and equipped laboratory now on the Nile. I was to 
follow up and augment the work already begun by Sheffield Neave, Avhose results appeared in 
the Second Eeport from the Wellcome Eesearch Laboratories. 
Work in From March 14 to April 15 I remained in Khartoum. This time was partly occupied in 
Khartoum studying the flies and other parasites already collected from the Sudan, and also in continuing 
investigations I had commenced elsewhere on intestinal ania'biasis. For the opportunity of 
conducting the latter study in the iNIilitary Hospital, Khartoum, I am indebted to Colonel 
G. D. Hunter, Principal Medical Oflicer of tbe Sudan, and to the other medical officers of the 
Staff, who kindly placed their laboratory and eases at my disjjosal. As a result of this investiga¬ 
tion, I was enabled to confirm part of Schaudinn’s work on human ammbiasis—the occurrence 
of amoeltat in persons not suffering from diarrhcea or dysentery, the occurrence of the same 
amadta in some cases of dysentery and the development of this amoeba by the production of 
cysts of abottt 14 p in diameter and containing at first one, then two, four, and finally eight 
nuclei embedded in a single mass of protoplasm. .-Vn amoeba reproducing in a similar manner 
Human 
amoeba* 
C. M. WPINTON 
-Jit —Floatui-,^ Lubonil. t;, .n-i .'..iTip at, Boi*. lmi the Jt-bel ihvL-r 
'I he laboratory 
as a fly-trap 
I found in a monkey. I was, however, unable to determine the presence of Schaudinn’s 
\>Mhogen\c. Entamu'Jxt histolytica, w'hich is peculiar to certain cases of dysentery and reproduces 
by encysting in a totally different manner from tbe amoeba just mentioned. 
1 left Khartoum for Taufikia on April 15 in company with Dr, Balfour. On the journey 
to Taufikia Dr. Balfour and I examined for intestinal flagellates, the Seroot fly, Tabanus 
sodas, which attacked the floating laboratory in large numbers. At the vei'y commencement 
the laboratory showed itself to be a veritable fly-tra]). The laboratory bas a door at each end, 
while on each side are three windows, over which mosquito-pi'oof gauze frames may be let 
down. By closing the gauze frames over the windows and leaving tbe doors open it was 
found that flies collected on tlie gauze, and thence could be readily removed for examination or 
into tbe killing bottle. Through all my journeyings on the Nile this method of capturing 
flies was most servicealile, and practically all the flies in my collection were thus entrapped 
upon the gauze window-frames. There being an excellent mosquito house on the upper deck, 
it was not necessary to use the laboratory as a mosquito-proof room, and so by the same device 
of leaving the doors open at night large numbers of mosquitoes were found on the windows in 
the morning. 
