1 ENCLOSURE TO PART 111. 
The majority of these strains are in the stage of progeny rows. 
That is they are represented by progeny rows each obtained from a 
single plant selection of the preceding year. Two strains have been 
sown as bulks and of these one will have to be discarded on account 
of Jassid susceptibility. 
Up to this season, 1925-26, all work has been done at the 
Makwapala Cotton Station which is situated at an elevation of about 
2,100 feet above sea level. . From and including the 1926-27 season it 
is proposed to dupicate the work at the Port Herald Cotton Station 
which lies at about 150 feet elevation. It is considered that these 
two stations cover the main types of climatic conditions under which 
cotton is grown in Nyasaland. 
All plants in all progeny rows are being harvested separately 
each into its own bag and comparisons are being drawn between the 
progeny rows in respect of the evenness of their component plants as 
regards Lint and Seed characteristics. Judgment being used in 
deciding which of the progeny rows are to be examined in this fashion, 
susceptibility or otherwise to Jassid attack being an important factor, 
provided that is that the rows are even vegetatively in so far as 
ordinary observations go. 
It is proposed to carry on the strains derived from these progeny 
rows in future seasons by taking for sowing as further progeny rows a 
number of plants which lie nearest the mean for the rows. 
From and including the 1926-27 season it is hoped that it will be 
possible to ensure self fertilisation in the case of all plants grown in 
the progeny rows. The tendency, therefore, will be, as time goes on 
to establish nucleus stocks of strains which will become more and 
more homozygous with each year that they are grown. 
A preliminary test will be made each season with part of the bulk 
seed from the progeny rows which appear to be particularly promising, 
using flowering and fruiting studies to decide which strains are worthy 
of inclusion in full field trials in the following season. The balance of 
the bulk seed being sown in each case in an increase plot. 
Full field trials will consist of plots, sown with seed obtained from 
the increase plots, arranged in such a way as to give a known degree 
of accuracy to the results obtained. All new strains used in these 
trials will be tested against the ordinary field crop as a whole as well 
as against one another. 
The most superior strain will be further bulked with a view to 
replacing with it the ordinary field crop as time goes on. The aim 
will be to retain the pure parent stock and from this obtain further 
supplies of seed wherewith to renew the general seed stocks as 
required. 
Any new varieties obtained in the future will be first sown in 
observation plots and then selections from them will be passed to the 
progeny rows for purification. 
(Sgd.) H. C. Ducker. 
August, 1926. 
AR