28 L. P. GUNSON & CO., ROCHESTER, N. Y. 
LETTUCE—(Continued) 
HEADING VARIETIES “‘ICEBERG TYPES’’ 
CORNELL No. 456 LETTUCE 
CAUTION—All Iceberg types of lettuce are affected by conditions. Minor 
variations in temperature, nutrition, and moisture at critical periods may cause a 
particular strain to head well or poorly. Consequently, it is difficult to produce a 
strain well adapted to a wide range of conditions. The varieties we offer have been 
tried under the variable weather of Eastern States. It seems too great a risk to 
make large plantings of any one variety at one time. Successful growers make 
successive plantings. 
CORNELL 456 80 Days 
A cross of Brittle Ice with Imperial 152. This lettuce is more resistant to 
tipburn than older strains of Iceberg, therefore better adapted for mid-summer 
conditions in this State and similar sections. Due to the Brittle Ice parent, it 
is lighter in color than other strains of Imperial. This new strain is meeting 
with favor and fills a needed space in plantings of Iceberg. 
EARLY GREAT LAKES 72 Days 
Here is a really fine head lettuce; earlier maturing and more uniform. The 
color is gray-green and outer leaves lay back exposing a large rounded head 
with smooth base and small ribs. Highest rating in New York State Trials 
and has been known to give better than 90% marketable heads at first cutting. 
GREAT LAKES LETTUCE 
