Picture this. (Letters)."Photography at a Crossroads" (SN: 11/23/02, p. 331) asserts that the earliest photographic image was taken in 1826. In fact, the earliest photographic image may date to much earlier. Using silver nitrate silver nitrate (nī`trāt), chemical compound, AgNO3, a colorless crystalline material that is very soluble in water. The most important compound of silver, it is used in the preparation of silver salts for photography, in chemical on linen linen, fabric or yarn made from the fiber of flax, probably the first vegetable fiber known to people. Linens more than 3,500 years old have been recovered from Egyptian tombs. Phoenician traders marketed linen in Mediterranean ports. (1992) and later silver sulfate Silver sulfate (Ag2SO4) is an ionic compound used in anions experiments, silver plating and as a non-staining substitute to silver nitrate. It is stable under ordinary conditions of use and storage, though it darkens upon exposure to air or light. (1994), Nicholas P.L. Allen was able to reproduce, in large part, the unique visual and chemical properties of the Shroud of Turin The Shroud of Turin (or Turin Shroud) is a linen cloth bearing the image of a man who appears to have been physically traumatized in a manner consistent with crucifixion. It is being kept in the royal chapel of the Cathedral of Saint John the Baptist in Turin, Italy. . The best one can say is that the 1826 photograph is possibly the earliest. PATRICK GILLESPIE, SOUTH STRAFFORD, VT. |
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