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Letters |
Wrote Letter L-357 of 1699-06-23 to the members of the Royal Society in response to Martin Lister's objections against his theory of generation; his opposition to the theory of spontaneous generation; the assumption of male and female spermatozoa |
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Letters |
Wrote Letter L-358 of 1699-08-05 to the directors of the United East India Company in Delft about circulation of the blood in the leg of a scorpion from India that they had sent to him; a description of the eight eyes and the pincers |
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Letters |
Wrote Letter L-360 of 1699-09-25 to Hans Sloane to request a reaction to previously sent letters and as cover letter for Letter L-361 of the same day to the Royal Society |
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Letters |
Wrote Letter L-361 of 1699-09-25 to the members of the Royal Society about the circulation of blood in tadpole capillaries, the transition from arteries to veins, blood clotting, the dissolution of clotted blood, and the origin of the name thunder-pad |
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Letters |
Wrote Letter L-362 of sometime in October 1699 to Ehrenfried von Tschirnhaus about medicines, his aversion to bleeding and purging, and his preference for tea and coffee as medicine; credulity of people who trust impostors and poorly trained physicians |
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Letters |
Wrote Letter L-363 of 1699-10-16 to Antonio Magliabechi about tiny animalcules from ditchwater, his opposition to spontaneous generation, and how animals serve as food for each other |
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Letters |
Wrote Letter L-364 of 1700-01-02 to Hans Sloane about liver fluke, gnat larvae, circulation of blood in a frog, and little animals in its feces |
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Letters |
Wrote Letter L-365 of 1700-01-14 to Nicolaes Boogaert van Belois about blood circulation in lizard legs, the way a lizard and a scorpion react to one another, the scorpion's eyes, pincers, and sting and the muscle fibres in that sting |
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Letters |
Wrote Letter L-366 of 1700-05-20 to Hendrik van Bleyswijk about the eyes and the sting of a centipede and the reactions of a fly and a lizard to a centipede |
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Letters |
Wrote Letter L-367 of 1700-05-20 to Anthonie Heinsius about peat, its composition and origin, how much soil washed into the sea by rivers and effect on sea level compared to amount of soil lost through peat cutting |
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Letters |
Wrote Letter L-368 of 1700-06-02 to Frederik Adriaan van Reede about the eyes, mouth parts, food, intestines, and eggs of a shrimp |
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Letters |
Wrote Letter L-370 of 1700-06-14 to answer Hans Sloane's Letter L-369 that he has examined the sperm of many animals, but if there is any animal that the Royal Society would like him to investigate, he will do so. |
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Letters |
Wrote Letter L-371 of 1700-06-16 to a "Highly Learned Sir" summarizing his earlier investigations of bees, especially the queen bee and her eggs, and of the propagation of other insects |
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Letters |
Wrote Letter L-372 of 1700-07-09 to Hans Sloane about red blood cells in flounder and salmon, how their oval form changes shape to pass through capillaries, and the sperm of a young cock |
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Letters |
Wrote Letter L-373 of 1700-07-10 to Anthonie Heinsius about seeds of plants and parts of invertebrates in peat found near Hellevoetsluis |
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Letters |
Wrote Letter L-375 of 1700-07-27 to Hans Sloane about experiments with the larvae of cheese flies received from Sloane a week earlier and the treatment of his wife's toothache with vitriol |
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Letters |
Wrote Letter L-376 of 1700-08-01 to "Your Most Serene Highness" about the influence of atmospheric pressure on the level of a water column in a glass tube during a capillary rise; comparison to the column of mercury in a barometer |
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Letters |
Wrote Letter L-377 of 1700-09-07 to Hans Sloane to follow up on Letter L-375 to Sloane about fly larvae in cheese |
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Letters |
Wrote Letter L-378 of 1700-10-26 to Hans Sloane about black flies on fruit trees, aphids, comparing the parthenogenetic procreation of aphids with sperm, and the development of the pupae of moths |
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Letters |
Wrote Letter L-380 of 1700-12-25 to Hans Sloane about the sperm of a ram and his objections to Nicolaas Hartsoeker's claim to have discovered sperm first in 1678 when Leeuwenhoek had written to the Royal Society about sperm in 1677 |
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Letters |
Wrote Letter L-382 of 1701-01-28 to Hans Sloane about gall on a willow and more about larvae from cheese |
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Letters |
Wrote Letter L-383 of 1701-02-09 to Frederik Adriaan van Reede about pores in willow wood and advice for the improvement of peat |
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Letters |
Wrote Letter L-384 of 1701-04-08 to the mayors of Delft about his calculation of the difference between the coal measures of Delft and Rotterdam and how to calculate the volume of a pyramid |
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Letters |
Wrote Letter L-385 of 1701-04-15 to the members of the Royal Society about sperm from cod, a calculation of its size, and ram and pike sperm |
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Letters |
Wrote Letter L-389 of 1701-06-21 to John Chamberlayne about salt crystals in rain-water and notches in a sharpened knife |
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Letters |
Wrote Letter L-390 of 1701-06-21 to the members of the Royal Society about spiders, their blood, their silk thread and its structure, their sting, and laying their eggs |
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Letters |
Wrote Letter L-391 of 1701-06-21 to Hans Sloane about the claimed qualtity of other people's magnifying glasses, injuries to the cornea, and the impossibility of observing the smallest particles of matter |
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Letters |
Wrote Letter L-392 of 1701-08-02 to the members of the Royal Society about circulation of blood in young eels and announcing his bequest of 26 magnifying glasses |
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Letters |
Wrote Letter L-393 of 1701-08-26 to Frederik Adriaan van Reede about measuring the fall of water, an accurate instrument for such measurements, and his invention of a level |
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Letters |
Wrote Letter L-397 of 1701-12-06 to Hans Sloane as a cover letter for Letter L-398 to John Somers |
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Letters |
Wrote Letter L-398 of 1701-12-06 to John Somers about the sperm of young cocks living for days outside the cock and whether that was long enough to fertilise a hen's egg |
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Letters |
Wrote Letter L-399 of 1701-12-20 to the members of the Royal Society about the sperm of spiders and how they copulate |
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Letters |
Wrote Letter L-400 of 1702-02-09 to Hendrik van Bleyswijk about three types of little animals from the gutter of his house, one of which was eaten by a larger animal, which could revive after being dried out |
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Letters |
Wrote Letter L-401 of 1702-02-14 to the members of the Royal Society about balsam, an apparatus he designed to inhale smoke and vapour, blood vessels in sheep lungs, his own phlegm, and the theory that cold air harms lungs |
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Letters |
Wrote Letter L-403 of 1702-04-20 to Karl von Hessen-Kassel as a cover letter for Letter L-404 |
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Letters |
Wrote Letter L-404 of 1702-04-20 to Karl von Hessen-Kassel about silkworms, the structure of the silk thread, and the organs that produce it, eyes, pincers, blood vessels, and cocoons, sperm from an adult silk moth, and the scales on its wings |
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