Among the instruments supplied for Vancouver's expedition of 1791 was 'a basin to hold quick-silver, with glass roofs, by Dollond', with a bottle of quick-silver.
Phakathi kwezixhobo ezanikelwa kuhambo lwaseVancouver ngo1791 kwakukho isitya sokubamba imethyuri enophahla lwegilasi nebhotile yemethyuri, eyenziwe nguDollond.