82 
Ohio Biological Survey 
Fig. 5. Section of the trunk of a “birdseye” maple. This tree was found on the 
banks of the Olentangy river, and was taken up and planted on the Univer¬ 
sity Campus by the author in 1884. 
The life of the less durable woods, such as cottonwood, basswood, 
sycamore, beech, and hickory, may be greatly lengthened by the use 
of certain preservatives. Painting, smoking, charring, kiln drying, 
and treating with some antiseptic, like creosote or corrosive sublimate, 
are means employed to prolong the life of wood. 
