Aside from the question of speed, however, it is probable that the two inventions which have added most to the passengers' comfort are the electric light and artificial refrigeration.
"American Merchant Ships and Sailors"
Willis J. Abbot
Hippocrates thought it was for the nutrition and refrigeration of the innate heat, Aristotle for its ventilation, Erasistratus for the filling of the arteries with spirits.
"Fathers of Biology"
Charles McRae
They have the characteristic flavor of refrigeration."
"The Model of a Judge"
William Morrison