32 PH ECA\U DU B.O.N]B Usb iaan 
suggesting that it is more valuable and more interesting to watch th 
poorer species of oaks such as black, scarlet and blackjack because the 
help stabilize the soil, help fight erosion, and contribute to the enrichmer 
of the soil. “Study the roots and see how they must scrabble and grab int 
the very thin soil cover to take hold in a way that the richer, more climax 
type oaks would never deign to do.” 
Among his other credits, Vinsen Brown is a biologist, ichthyologis 
and herpetologist. He has traveled widely in the Western hemispher 
studying animal and plant life. —Mrs. I. L. Moste 
A FASCINATING BOAT CRUISE 
OF THE CHICAGO INLAND WATERWAYS 
SATURDAY, MAY 16, 1970 
This is a rare opportunity to view the ecology and geography 
of this area so important to the economic development of Greater 
Chicago. Not only will you travel on waterways unique because 
of their reverse flow, but you will see shipping both international 
and barge, bridges of great variety, steel mills, oil refineries, 
heavy industry, forested areas and the Chicago skyline. You 
will cruise on Lake Michigan, through Calumet Harbor, and on 
the Calumet River, the Calumet-Sag Channel, the Chicago Sani- 
tary and Ship Canal and the Chicago River. Competent narrators 
will comment on the highlights and their historical background 
as we proceed. Pollution problems and the role played by the 
Metropolitan Sanitary District will be discussed as will be the 
future possibilities for water oriented recreation. 
EMBARK: 8:45 a.m. from the Wendella dock at the 
Michigan Avenue Bridge at Wacker Drive. 
COST: $7.50 per person / Use the Reservation 
Coupon. (Box Lunch Served Enroute) 
RESERVATION 
TO: Illinois Audubon Society, 1017 Burlington Ave. 
Downers Grove, 60515 
Please send ...... tickets at ~ Name ........ 32 | 
$7.50 each; enclosed is. my ADDRESS .. {2333 
checkelore Gere ese 
(Make checks payable to Illinois Audubon Society.) 
