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Letters |
Wrote Letter L-405 of 1702-04-28 to the members of the Royal Society about little animals and air bubbles in rain water and the circulation of blood in an eel |
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Letters |
Wrote Letter L-407 of 1702-12-08 to John Chamberlayne about cleaning and preserving teeth by polishing them with salt and ash of tobacco and whether tea and coffee harm teeth; requested a book on Peruvian silver mines |
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Letters |
Wrote Letter L-408 of 1702-12-25 to the members of the Royal Society about duckweed, its roots and reproduction, the little animals attached to it, and asexual reproduction |
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Letters |
Wrote Letter L-409 of 1703-02-05 to the members of the Royal Society about colony-forming little animals from Delft canal water, dissolving silver and gold in acids, and why there is little duckweed on the surface of water in cold weather |
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Letters |
Wrote Letter L-410 of 1703-02-26 to the members of the Royal Society about the structure and germination of pips of oranges from Surinam and Curaçao |
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Letters |
Wrote Letter L-412 of 1703-11-03 to Hans Sloane to thank him for sending recent numbers of Philosophical Transactions and the book on Peruvian silver mines, also as a cover letter for Letter L-413 |
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Letters |
Wrote Letter L-413 of 1703-11-03 to the members of the Royal Society about the liver fluke in soil from meadows, worms and other little animals in soil, and a theory about how they propogate |
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Letters |
Wrote Letter L-414 of 1703-12-04 to the members of the Royal Society about the shape of a grain of fine sand from the Dutch East Indies |
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Letters |
Wrote Letter L-415 of 1704-01-08 to the members of the Royal Society about salt crystals out of rainwater that during a "frightful storm" in December had dashed against the windows of his house |
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Letters |
Wrote Letter L-416 of 1704-02-01 to the members of the Royal Society about red sandstone from the cathedral at Utrecht compared to diamond, his theory about the origin of diamonds, and marble, Bentheim stone, alabaster, and gold and silver ore |
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Letters |
Wrote Letter L-418 of 1704-02-11 to Pieter Valckenier about rock crystal, its origins in the mountains, and fossils of ocean fish found in his Swiss mountains |
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Letters |
Wrote Letter L-419 of mid-February 1704 to Siewert Centen to refute his contention that cochineal must be a plant, not an animal |
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Letters |
Wrote Letter L-422 of 1704-03-21 to the members of the Royal Society about cochineal and the insects that are the source of this dye |
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Letters |
Wrote Letter L-423 of 1704-07-22 to the members of the Royal Society about muscle fibers of whales, the structure of the eyes' lenses of whales and cod, and his theory about why fish have no eyelids |
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Letters |
Wrote Letter L-424 of sometime before 16 September 1704 to Pieter Hotton about the canals that raise the yellow sap in a common plant |
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Letters |
Wrote Letter L-426 of 1704-09-16 to the members of the Royal Society about leaves of aloe and a plant called dragon's blood sent to him by Pieter Hotton with Letter L-425 |
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Letters |
Wrote Letter L-427 of 1704-10-03 to John Chamberlayne as a follow-up to Letter L-407 about tobbacco ashes, the salt crystals obtained from them, and an oily substance obtained by heating the ashes of tobacco |
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Letters |
Wrote Letter L-428 of 1704-11-04 to the members of the Royal Society about little animals with two wheels, found on duckweed, how they move, their parasites, and the theory that sea water makes land more fertile |
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Letters |
Wrote Letter L-431 of 1704-12-13 to the members of the Royal Society about the origin of rock-crystal and a description and analysis of fossils of sea animals and two Roman dice all found in Switzerland and given to him by Pieter Valkenier |
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Letters |
Wrote Letter L-433 of 1705-03-03 to the members of the Royal Society about silver deposits on his own hands after he mixed gold and silver with acid and treatment of a callous on his own finger with vitriol and then acid |
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Letters |
Wrote Letter L-434 of 1705-03-03 to John Chamberlayne about vitrified matter from a haystack that had caught fire, sent to Leeuwenhoek with Letter L-429 |
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Letters |
Wrote Letter L-436 of 1705-03-12 to Antonio Magliabechi about precipitating silver from aqua fortis, silver sulphate crystals, their comparison with rock crystal, saltpetre, and sugar candy |
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Letters |
Wrote Letter L-437 of 1705-03-27 to the members of the Royal Society about his theory that bark tissue is formed from wood; cross-sections and pictures of vessels and cells of bark and wood tissue of cherry, birch, cinnamon, and lime trees and from cork |
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Letters |
Wrote Letter L-438 of 1705-04-24 to the members of the Royal Society about a fern and its seed capsules and an experiment to open and close them |
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Letters |
Wrote Letter L-439 of 1705-05-25 to the members of the Royal Society about crystals from various minerals that Pieter Valkenier left after his recent visit and experiments to dissolve and recrystallize them |
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Letters |
Wrote Letter L-441 of 1705-12-18 to Francesco Corner about the structure of a pearl compared to that of an oyster's shell, salts from pearls and oysters' shells heated and afterwards dissolved, and an argument against the grit of pearls as medicine |
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Letters |
Wrote Letter L-442 of 1705-12-29 to the members of the Royal Society about pumice stone, its origins, and its salts, sponge and a theory about how it absorbs water, and coral |
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Letters |
Wrote Letter L-444 of 1706-03-07 to Govert Bidloo to follow up on his visit earlier that day about what Leeuwenhoek discovered in the intestines they had viewed |
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Letters |
Wrote Letter L-446 of 1706-03-19 to the members of the Royal Society about an East Indian tree and mixing his own blood with the crushed seed of the tree and water, the effects of a drink made from hemp seed, and a dissected hemp seed |
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Letters |
Wrote Letter L-447 of 1706-04-20 to the members of the Royal Society about a piece of hanged woman's intestinal wall brought to him by Govert Bidloo |
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Letters |
Wrote Letter L-448 of 1706-06-01 to the members of the Royal Society about the structure of a sheep's spleen and a flea's organ for stinging and sucking |
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Letters |
Wrote Letter L-449 of 1707-01-01 to Angelus van Wikhuysen about the use of cinchona bark as a remedy |
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Letters |
Wrote Letter L-454 of 1707-07-05 to the members of the Royal Society to acknowledge the receipt of Letter L-453 and to cover the enclosed copy of Letter L-436 of 12 March 1705 to Magliabechi |
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Letters |
Wrote Letter L-455 of 1707-07-12 to the members of the Royal Society as thanks for numbers of Philosophical Transactions and as cover to a copy of Letter L-441 to Corner; mentioned the visit of Gilbert Burnet |
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Letters |
Wrote Letter L-458 of 1707-08-10 to Anthonie Heinsius as a cover letter for a copy of Letter L-457 of 25 July 1707 to the Royal Society |
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Letters |
Wrote Letter L-459 of 1707-10-18 to the members of the Royal Society about the fur on his own tongue after an attack of fever, the fur of a thrush patient, and a theory about the origin of tongue fur |
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