Record

RefNoMS/957/79
LevelItem
TitleLetter from H F [William Henry Fox] Talbot, Worthing, to 'dear Sir' [Henry Kater]
CreatorTalbot; William Henry Fox (1800-1877); British pioneer of photography
RecipientKater; Henry (1777-1835); British geodicist and metrologist
Date8 February 1826
DescriptionTalbot has found his notes from Munich on [Joseph von] Fraunhofer's method of making object glasses. He does not consider this important, but relays a description of the process, including an integral sketch of the steel spherule and cup arrangement used to grind the glass. The largest and smallest lenses are not ground in that way. Glasses are polished using red oxide of iron throughout the full polishing process. Talbot also describes this, including the back-and-forth mechanical motion. Centering the object glass is done by attaching it to a small telescope, with the aid of three steel points, looking from the object glass to the eye glass.
Extent2p.
FormatManuscript
PhysicalDescriptionInk on paper
Dimensions230x185mm.
AccessStatusOpen
Fellows associated with this archive
CodePersonNameDates
NA5837Talbot; William Henry Fox (1800 - 1877)1800 - 1877
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