No. 28. 



The chestnut tree in the centre of the picture shows four well-developed 

 lesions. Photograph Ijy Prof. Collins. 



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, 

 (nothnig evident in this photograph) ; the second, an infection of from two to three 

 years old ; the third four or more years old ; and the fourth about three years old. 

 Scene near Brooklyn, New York. Photograph l>y Prof. Collins. 



