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Master list (pdf) of all 602 L-numbers, their Leeuwenhoek number, and their Collected Letters number
Letter 44 Figures 1-10
Letter 44 No. 1: Salt particles in Carduus benedictus. Soutfiguirtgens in sout van Carduus Benedictus.
Letter 44 No. 2: Salt particles in salt of wormwood. Soutfiguirtgens in sout van alsem.
Letter 44 No. 3: Hexagonal salt particles in alum. Seshoek soutfiguirtgens in aluijn.
Letter 44 No. 4: Particles in saltpetre. Deeltgens in saltpetre.
Letter 44 No. 5: Salt particles in vitriol de Cipres or blue vitriol. Soutfiguirtgens in vitriool de Cipres off blaauw vitriool.
Letter 44 No. 6: Salt particles in liquor tartari. Soutfiguirtgens in liquor tartari.
Letter 44 No. 7: Salt particles in Muscovite potash. Soutfiguirtgens in Moscovische potas.
Letter 44 No. 8: Crystalline particles in camphor. Cristalline figuirtgens in campher.
Letter 44 No. 9: Salt or ash from the furnace of a cannon or gun foundry. Sout of as uijt den oven van een canon off geschutgieterie.
Letter 44 No. 10: Ash near the mouth of a tin- or lead-furnace. As bij de mont van een tin off loot oven.
Letter 44 of January 23, 1685 No. 10 | Arcana Naturae Microscopiorum
Letter 44 No. 11: Particles in black material from chimney of a tin- or lead-furnace. Figuiren in swarte materie uijt de schoorsteen vande tin of loot oven.
Letter 44 No. 12: Salt particles in limestone. Soutfiguirtgens in steenkalk.
Letter 44 No. 13: Salt particles in shell-lime. Soutfiguirtgens in schulp kalk.