Summary

Asks writer of an article on weeds why he supposes "there is too much reason to believe that foreign seed of an indigenous species is often more prolific than that grown at home?" The point is of interest to CD "in regard to the great battle of life which is perpetually going on all around us". Cites analogous observations by Asa Gray and J. D. Hooker. Does writer know "of any other analogous cases of a weed introduced from another land beating out … a weed previously common in any particular field or farm?"

Summary

Reports the decreased yield of pods resulting from excluding bees from the flowers of the kidney bean. Gives other observations suggesting the importance of bees in the fertilisation of papilionaceous flowers.

Cites cases of crosses between varieties of bean grown close together and requests observations from readers on the subject. States his belief "that is a law of nature that every organic being should occasionally be crossed with a different individual of the same species".

Summary

Asks anyone who possesses a treatise on gardening, or an almanac, one or two centuries old, to look up what date is given as the proper period for sowing scarlet runners or dwarf French beans. CD wants to ascertain whether these plants can now be sown earlier than was formerly the case.

Summary

Asks botanical readers to inform him "whether in those monoecious or dioecious plants, in which the flowers are widely different, it has ever been observed that half the flower, or only a segment of it, has been of one sex and the other half or segment of the opposite sex, in the same manner as so frequently occurs with insects?"

Summary

Solicits information about the kind of syphon required to convey water from a proposed large water tank to existing smaller ones.

Summary

Reports on observing hive-bees visiting the leaves of vetch and bean and sucking the minute drops of nectar secreted by the glands on the underside of the stipulae. This phenomenon proves wrong those botanists who believe nectar to be a special secretion for the sole purpose of luring insects to visit flowers and thus to aid in their fertilisation.

Summary

CD has saved an enormous amount of labour since he replaced the chain on his deep well with wire rope. He now asks readers whether they have had experience of saving on the weight of the bucket by using some material other than oak.

Summary

Asks readers of Gardeners’ Chronicle whether they have experience with light wire rope instead of chain in drawing water buckets from deep wells. Describes the problem of his own well with its 325 foot chain.

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Discusses CD’s paper ‘Formation of mould’ and CD’s views on earthworms.

Summary

Suggests that the scarcity of holly berries is owing to the scarcity of bees during the spring, rather than to frost. He does not know what caused the scarcity of bees.

Summary

Writes to correct a statement made in his 1837 paper "On the formation of mould" [Collected papers 1: 49–53]. He should have said that marl was put on the field 30 years ago, not 80. Observations made on a visit to the field showed that worms had undermined the marl spread on the field at a faster rate than previously reported.

Summary

Reports on his experiments on action of sea-water on seeds and the bearing of his investigations on the theory of centres of creation and Edward Forbes’s theory of continental extensions to account for distribution of organic forms. CD’s experiments confirm germination powers were retained after 42 days’ immersion by seven out of eight kinds of seeds.

Summary

Wants to hear from readers about the way in which the bee-orchid (Ophrys apifera) is fertilised. He has always found it to be self-fertilised but greatly doubts that the flowers of any plant are fertilised for generations by their own pollen. The bee-orchid has sticky glands, which would make it adapted for fertilisation by insects; this makes him want to hear what happens to its pollen-masses in places he has not observed.