The "Great Geyser" boiling spring, Iceland, in eruption. Coloured engraving by F. Chesham, 1797, after a drawing made in 1789.

London (Great George Street Westminster) ; London (Old Bond Street) : N. Pocock and W. Miller, 1797.

1 print : engraving, with watercolour ; image 19.9 x 30 cm

View of the Geyser as seen at the commencement of an eruption. ; the eruptions of the Geyser encrease in beauty and duration, as the steam occasioning them has to escape through greater quantities of water in the pipe and bason, & when the latter is nearly filled, the jets, from their projectile force being weakened, are seldom in the beginning, thrown up with great rapidity & sharpness, but are broken & spreadout in their ascent. ; very little steam appears to rise from the water, when it is still, though immediately after one of the eruptions preceding the great one, when most still, its heat is greatest. analysed by dr. Black of Edingurgh. an English gallon of the Geyser water, was found to contain ; caustic fossil alkali gr. 5:56 ; argillaceous earth 2:80 ; siliceous earth 31:38; common salt. gr. 14.42. ; glauber's salt exsiccated 8.57. ; see 3d. vol. of phil. trans. R.S. Edinb. ; from a drawing taken on the spot, 1789. ; engrav'd by F. Chesham. ;

Wellcome Collection 35841i