No. L's. 'I'lu' chestnut tree in the centre of the picture shows four well-developed 

 It'sions. — I'hotograph by Prof. CoUins. 



No. 29. Typical group of dead chestnut trees. Note dead suckers on the trunks. 

 From left to right :— the first trunk shows the disease less than one year old, 

 (nothniff evident in this plotographi : the second, an infection of from two to three 

 .years old: the third four or nmre years old: and the fourth about three years old. 

 Scene near Brooklyn, New York. — Phutonraiih hi/ Prof. CoUitis. 



