17, i Ash: The Physician and the Laboratory 53 
The general principles that I wish to advocate are these : 
1. That it is a greater crime to neglect these benefits than 
to overindulge them. 
2. That there must be the closest cooperation between clini- 
cian and pathologist. 
3. That the clinician must be familiar with laboratory work 
to the extent of knowing how, when, and where to depend on it, 
and the pathologist must be sufficiently experienced in clinical 
matters to handle intelligently the materials submitted to him; 
and lastly, I have argued myself, and I hope you also in a measure 
at least, to the conclusion that the physician does not do full 
justice to his patient until he has developed to their fullest pos- 
sibilities the natural powers of observation, has exhausted these 
on the bedside consideration of the case and then, and only then, 
given him the full benefit of the aid the laboratory can be in 
corroborating, elaborating, or eliminating his conclusions. Un- 
der these circumstances will you come the nearest to the proper 
solution of the problem — the diagnosis and treatment of the 
condition for the relief of which the patient has entrusted him- 
self to your care. 
t 
