Parliamentary Papers, Volume 9H.M. Stationery Office, 1957 - Bills, Legislative |
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Page 159
... species of Biomphalaria are found -- B . sudanica and B. pfeifferi . Work on variation of the latter species is attempted when- ever material becomes available . Attempts to breed parasitically clean snails in the laboratory continue to ...
... species of Biomphalaria are found -- B . sudanica and B. pfeifferi . Work on variation of the latter species is attempted when- ever material becomes available . Attempts to breed parasitically clean snails in the laboratory continue to ...
Page 194
... species , with only partial success ; some bred through from egg to adult , but none have reached the second generation despite the use of methods old and new . Most of the species clearly are more difficult to handle than those of the ...
... species , with only partial success ; some bred through from egg to adult , but none have reached the second generation despite the use of methods old and new . Most of the species clearly are more difficult to handle than those of the ...
Page 242
... species tested required further refinement in order to produce boards of adequate strength . Considerable differences in behaviour between the species were observed in this stage of the process . Pulps from morabukea and kempas could be ...
... species tested required further refinement in order to produce boards of adequate strength . Considerable differences in behaviour between the species were observed in this stage of the process . Pulps from morabukea and kempas could be ...
Contents
INTRODUCTORY | 6 |
Actual issues in respect of Research Schemes 19401957 | 18 |
CONTENTS | 140 |
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