ERRATA 
Page 2, line 10 
for was read were 
Page 85, line 32 
insert a after of 
Page 97, line 25 
for mitotic read meiotic 
Page 124, lines 4—5 
for Dogbone read Dogbane 
Page 124, line 19 
replace period following poison with comma 
Issued November 16, 1962 
[ xvi | 
