No summary available.
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Notes, calculations, and diagrams on phyllotaxy.
Discusses some angles [relating to phyllotaxy].
The forthcoming school holidays.
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Enquires about the relationship of English grains to French milligrammes.
Calculates the relationship between grains and milligrams; asks his mother for a fruit tart and twelve napkins.
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Asks GHD what the chances are against squinting and non-squinting children coming alternately in a family of ten.
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