Uppsala, Sweden/upps168

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Observed the different colors of the solar spectrum. Observed the darkening of silver chloride was from the formation of silver.
Observed phosphorus in bones.
Observed that graphite consists of carbon, and the differences between forged and nonforged iron with respect to carbon content.
Observed that the brittleness of iron and steel was due to a contamination of phosphorus.
Described the durable green pigment "Swedish green" or "Scheele's green" consisting of copper arsenite.