163 



regards pressure, experiments have shown that at a temperature between 

 77°F. and 83°F. and a relative humidity of approximately 100 per cent, 

 and at an atmospheric pressure of approximately 23 inches of mercury, 

 the longevity of C.fatigans, up to ten days, is not affected by a reduction 

 in pressure corresponding to a height of between 5,000 and 6,000 feet 

 above sea-level. Under the above conditions, the development of 

 Proteosoma gyassii (the parasite cf bird malaria) in C. fatigans 

 proceeds in a normal manner. 



Fauntlerov (C. M). a Portable Cyanide Gas Generator for fumigating 

 small Compartments. — Pub. Health Rcpts., Washington, D.C., 

 xxxvi, no. 26, 1st July 1921, pp. 1504-1510, 1 plate, 1 fig. 



The apparatus described and illustrated is designed for use in the 

 fumigation of small compartments on ships by fractional generation 

 of hydroc3^anic acid gas. The gas is produced by a combination of 

 dilute commercial sulphuric acid and dry sodium cyanide in a portable 

 generator, and is discharged into the sealed compartments, from the 

 outside, through a keyhole, ventilator or other small opening. The 

 keg generator consists of an ordinary 15-gallon beer keg, with a simple 

 superstructure comprising a cyanide hopper, long-stem valve and 

 discharge pipe. A sectional diagram of the apparatus is given, with 

 explanations of structure, materials and measurements, all the parts 

 being easily obtainable and readily put together. The preparation 

 for fumigation and»the actual operation are described and also the 

 method of cleaning the apparatus (which is most important). The 

 advantages of this apparatus are that it is portable, safe, efficient 

 and rapid, requiring little labour, entailing very little expense and will 

 remain in serviceable condition over a long period of time. 



HiLDEBRAXD (S. F.). SuggestloHs for a Broader Application of 

 Gambiisia for the Purpose of Mosquito Control in the South. — 



Pub. Health Repts., Washington, B.C., xxxvi, no. 25, 24th June 

 1921, pp. 1460-1461. 



The value of the fish, Gambusia, in mosquito control is discussed 

 [cf. R.A.E., B, vii, 162], and its distribution to all standing and sluggish 

 waters, so far as possible, is suggested. Ponds that are easily accessible 

 and adapted to the propagation of the fish should be used to breed 

 them for general distribution. Every effort should be made to 

 educate the public as to the importance of this fish and where a 

 supply of it may be obtained free. 



SiNTON (J. A.). Relapsing Fever at Meshed, North-East Persia. — 



Indian Med. Gaz., Calcutta, Ivi, no. 7, July 1921, pp. 241-250, 

 5 tables, 11 charts. 



A number of cases of recurrent fever are described that occurred in 

 north-east Persia in 1918. The infection was apparently carried by 

 lice [Pediculiis], as measures directed against them stopped the spread 

 of the outbreak among the troops and hospital personnel, although no 

 measures were taken against bed-bugs [Cimex] which were also present 

 in the quarters of the troops. No ticks were observed in the hospital 

 buildings. The presence of numerous spirochaetes in a louse taken 

 from a patient tends to confirm this theory. 



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