6 inch transit theodolite by Troughton and Simms, mid 19th century, sectioned 6 inch transit theodolite by Troughton and Simms
Portable transit instrument by Brauer of Pulkowa Observatory, c.1850. With tripod. Portable transit instrument by Brauer of Pulkowa Observatory
Lesverre heliograph as designed in 1856, by Molteni, 1856-1900 Lesverre heliograph as designed in 1856