Percent weight quinine in cinchona bark
29 May

Percent weight quinine in cinchona bark

Percentage by mass of chlorine in ddt
16 May

Percentage by mass of chlorine in ddt

Perchloric acid in solution formula
20 Jul

Perchloric acid in solution formula

Pesticide 14 day cycle
11 Sep

Pesticide 14 day cycle

Pesticide method evaluation
16 Jan

Pesticide method evaluation