Telescopic alidades came into use in Europe in the early 1800s, and were soon introduced to American practice. In 1865 the U. S. Coast Survey stated that the plane table with telescopic alidade was ...

accession number 281267 catalog number M-12327 Object Name Alidade Measurements overall: 9.2 cm x 63.5 cm x 20.5 cm; 3 5/8 in x 25 in x 8 1/16 in overall in case: 3 1/2 in x 25 in x 8 in; 8.89 cm x 63 ...