Don Juan 04-112
Canto the Fourth
 
 CXII
 
Humboldt, "the first of travellers," but not
 The last, if late accounts be accurate,
Invented, by some name I have forgot,
 As well as the sublime discovery's date,
An airy instrument, with which he sought
 To ascertain the atmospheric state,
By measuring "the intensity of blue:"
Oh, Lady Daphne! let me measure you!

George Gordon Byron, Lord Byron (1788-1824) 
ByronLong