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The Text of van Gutschoven’s Letter to Huygens No. 1148

[Posted here is the full original text of Huygens letter 1147, for which there are some comments here A Method of Grinding Small, Spherical Lenses: Spinoza ]

No. 1147.

[G. van Gutschoven] à [Christiaan Huygens].

[1663]

Apendice au No. 1146.

Instrumentum ad vitra minoris sphaerae terenda.

Laminam eream AB schamno tornatorio affixam excavabis secundum circulum CD cuneo parato in formam circuli aequalis circulo vitri formandi. dice aequalis circulo maximae sphaerulae cuius lens particulam referat. in hoc excabato canali CD, atteres vitra capulae affixa et canali appressa : modo capulam in manu continuo dum vitrum attertur vertas, ut ex omni parte vitrum aequaliter atteratur : consultissimum autem erit laminam horizontalier circumagatur, nam hoc modo non tam facile arena decidet, vltimam autem polituran vitro addes simili lamina sed stannea terra tripolitana inserta : vel lamina simili lignea ex lingo aliquot molliori, quale est salicis, vel populi.

Lentes cavas formabis sphaerula stannea vel plombea EF schamno tornatorio affixa ut vides, polies vero eadem sphaerula vel lignea ut superius dictum terra tripolitana inserta.

Hoc concavo cono schamno tornatorio affixo, scabies vitrorum limbos polies, ne dum ultimam in charta inducimus vitro polituram, particulae tenuiores vitri exfilientes et in poros chartae sese infinuantes vitrum deturpent.

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2 responses to “The Text of van Gutschoven’s Letter to Huygens No. 1148

  1. Pingback: A Method of Grinding Small, Spherical Lenses: Spinoza « Frames /sing

  2. Pingback: Spinoza and Huygens « Antoni van Leeuwenhoek Centraal

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