P)ark l)oi-(_M- work ;it Bath-on-thc-Hiulson 



Two white pines taken September 22, 1901 



Same, photographed April 1902. These two illustrate the rapiility with 



which trees may be killed by bark borers. 1 Omicus calli- 



graphus Germ, anil Y. j) i n i Sa\' were responsible for most of 



the injury. 



766 



