Bromide print of Kelvin's tide-predicting machine (inv. no. 1876-1129) Bromide print of Kelvin's tide-predicting machine 1925
Bromide print of the second model of a tide-predicting machine (inv. no. 1881-135) Bromide print of model of Kelvin's tide-predicting machine 1925
Bromide print of original model of Kelvin's tide-predicting machine (inv. no. 1881-12) Bromide print of model of Kelvin's tide-predicting machine 1925