Merrill Cowman joined in 1934 .
The two of them formulated Garden City 's first set of glazes in yellow , green , blue , orange , cobalt , turquoise , black and white .
Merrill Cowman joined in 1934 , and the two of them formulated Garden City 's first set of glazes in yellow , green , blue , orange , cobalt , turquoise , black and white .