204 
Mr. E. E. Green: Mr. Chairman—Dr. Gough’s paper has 
interested me very much, because I had some interesting ex- 
periences in Ceylon in connection with the very limited cotton 
cultivation that has been carried on there. I should like to ask 
him whether he does not think that the Gelechia gossypiella 
might possibly have been already present in Egypt on some 
of the other plants which have been grown there for a great 
number of years. 
Dr. Goucu: I think it must have been introduced within the 
last ten years. There are a number of enthusiastic entomo- 
logists in Egypt, and quite a number of old collections, and I 
think that had the insect been in the country it must have 
been found. At all events it has only become common in the 
last few years, and there seems to be no evidence that any of 
the insects had been taken prior to 1910 in Egypt. 
Mr. Green: Did I understand you to say that carbon disul- 
phide had no effect on the larve unless the vapour was 
circulated through the seed? Carbon disulphide is usually con- 
sidered such a very useful remedy, and, the vapour being 
heavier than air, it is supposed to be sufficient to put the liquid 
in an open vessel on the surface of the seed to be treated. 
Dr. Goucu: That is quite contrary to our experience. As 
soon as we circulated the carbon disulphide vapour there was 
no difficulty in killing off the larve. The circulation of the 
vapour was maintained by means of an air pump. 
Mr. J. W. McConneL_: At what time in the year do you see 
these insects in the growing crop? 
Dr. GoucH: The first moths come to life about July; after 
that we take moths continually till January. 
LES SELS NUISIBLES ET LE COTONNIER EN RGYPTE. 
Par Victor M. Mosserzr, 
Membre de l'Institut Egvptien. 
[AgsTRact. | 
De ce que le cotonnier végéte, dans la partie septentrionale 
de l’Egypte, sur des terres qui renferment des doses assez 
clevées de sels nuisibles dans les soixante ou quatre-vingt-dix 
premiers centimetres de profondeur, on en conclut d’ordinaire 
que cette plante manifeste a l’égard des dits sels une grande 
résistance. On est allé jusqu’a admettre, que la présence dans 
le sol de 1 a 1°5 pour cent de chlorure de sodium, n’avait aucun 
effet defavorable sur le cotonnier, tant au point de vue de sa 
végétation que de son rendement. 
Avant depuis longtemps reconnu I'erreur d’une telle opinion 
