The Helmholtz statue (ΡΊ) in front of Humboldt University, Berlin. |
“The matter of multiplicity of contributors needs no great explanation, for we are all used to this in the modern handbooks. I believe it is a common saying that Helmholtz was the last universal genius, and we are fast arriving at the point where even a single subject becomes too vast for one man. At any rate, whether or not any of my learned colleagues could write an entire chemical engineering handbook, I could not—hence the present form.”— Donald Liddell (1922) Handbook of Chemical Engineering [1]