popper-logic-scientific-discovery

new appendices 311
Yet I had not only to examine the rules of the probability calculus: I
had also to formulate rules for the evaluation of tests—that is, for degree of
corroboration. This was done in a series of three papers, here reprinted
in appendix *ix. Appendices *vii and *viii form a kind of link between
my treatment of probability and of corroboration.
The remaining appendices will be, I hope, of interest to both philosophers
and scientists; especially those on objective disorder, and on
imaginary experiments. Appendix *xii consists of a letter from Albert
Einstein, here published for the first time, with the kind permission of
his literary executors.