15 
stables, chicken houses, privies, etc., are the ones generally affected, 
and also those growing on the margins of lakes, or on low, wet, poorly 
drained soils. 
Fia. 2,—Die-back. a, twig of sweet orange (0. aurantiwm) from which the leaves have fallen and a 
portion is dying back; b, swellings on young sweet orange twig caused by gum pockets in the 
wood; c, sweet orange with an abnorma! number of buds developed in the leaf axils; d, lemon (C. 
lmonum) twig with abnormal number of buds developed. qaand b slightly reduced, ¢ and d natural 
size. 
