Atmosphere transparency measuring instrument | The Hellenic Archives of Scientific Instruments

Error message

Deprecated function: Creation of dynamic property MergeQuery::$condition is deprecated in MergeQuery->__construct() (line 1357 of /home/UiaQ64igiG0ni2KR/hasi_gr/public_html/includes/database/query.inc).

Deprecated function: Creation of dynamic property DatabaseCondition::$stringVersion is deprecated in DatabaseCondition->compile() (line 1887 of /home/UiaQ64igiG0ni2KR/hasi_gr/public_html/includes/database/query.inc).

"Keilsichtmesser nach Prof. Dr Wigand"
Dr A. Wigand developed in the 1910ies a method for measuring the transparency of the atmosphere. The instrument comprises a prism with varying density.
Serial No 100762

Data