His custom-made `` linnaeus-thermometer '' , for use in his greenhouses , was made by PERSON@1 , LOCATION@1 's leading maker of scientific instruments at the time and whose workshop was located in the basement of the Stockholm observatory .

His custom-made `` linnaeus-thermometer , '' for use in his greenhouses , was made by PERSON@1 , LOCATION@1 's leading maker of scientific instruments at the time . PERSON@2 's workshop was located in the basement of the Stockholm observatory .
