Photo by H. P. Baker. 
Fic. 16. Devil’s Dye-tub at Tully Lake. This is supposed to be an arm 
of the lake isolated by vegetation filling and now become a typical bog but 
with remnants of fresh water vegetation —e. g., the cat-tail. Borings 
made with a Davis peat sampler in the marginal tamarack zone showed over 
ten feet of peat and beneath this, twelve feet of peat-stained marl. The in- 
strument was not long enough to reach the bottom of the marl bed. 
_ Fic. 17. Details of a clump of invading heath shrub (leather leaf) seen 
in fig. 19. The Sphagnum matrix and remnants of the sedge mat are shown. 
