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compound of our output in which these drugs enter as 
_ ingredients are included i in this category. An examination — 
of « our price list reveals the fact that more than one thousand 
of our products are rendered definitely and uniformly active 
by our perfected system of testing. 
| For this -work« we maintain laboratories which afford 
"unequaled facilities—under the supervision of scientists of 
world-wide » reputation. — 
ope, drugs. herein tabulated comprise the most important 
Ss which depend for their value upon a —— : 
or assayable a active principle. | 
" PARKE, Davis & CO. 
