I wish you would consider them seriously, and separately, and recur to them again 'pro re nata' in similar cases.
"The PG Edition of Chesterfield's Letters to His Son" by The Earl of Chesterfield
Colaturae addi possit pro re nata aq.
"An Account of the Diseases which were most frequent in the British military hospitals in Germany" by Donald Monro
S. Teaspoonful pro re nata.
"A System of Practical Medicine by American Authors, Vol. I" by Various