rriii.ic nh'M.rn 



Bird Rock 

 Group 



Love making of the prairie chicken. In this po- 

 sition and with orange-like air sacks inflated, he 

 produces a booming sound which may carry a dis- 

 tance of two miles. 



hike with \\w tiirclx' \va.^ tlic I'cd- 

 \\viu\ (luck, wliich lay.^ from fifteen 

 to t\V(Mit\' (\i2;,ti;s. ( l^eprodiiccd from 

 stiKlic.-^ made at Crane Lake, Sas- 

 katchewan. CaiKuhi.) 



The loon is justly famed for its 



skill as a diver, and 

 Loon Group .^, 



can swim with ^reat 



sjxhmI under water. Its weird call 



is a familiar sound on the northern 



New En<2;land lakes. Many loons 



])ass the winter at sea fifty miles 



or more from land. (Reproduced 



from studies at Lake Umbagog, 



New Hampshire.) 



This rocky island thirty mil(\< 



from shore in the Gulf 



of St. Lawrence 



affords some protec- 

 tion to the sea birds which still nest 

 in great numbers on and in its 

 cliffs, although the colony is a mere shadow of what it was even fifty 

 years ago. Seven species are shown nesting in the group. Namely 

 the razor-billed auk, petrel, gannet, puffin, Kittiwake gull, common 

 murre and Brunnich's murre. (Reproduced from studies at Bird Rock, 

 Gulf of St. Lawrence.) This was the first habitat group. 



[Return to the South Pavilion containing the apes and monkeys.] 



WEST CORRIDOR ;X^ 



Public Health 

 Returning to the South Pavilion where the monkeys are, and passing 

 to the right, we enter the West Corridor containing the exhibits of the 

 Department of Public Health. 



The first section of the exhibit deals with the natural history of water 

 supply as it affects the life and health of man. Large 

 Water Supply photographs at the entrance to the corridor on the left 

 illustrate the primary source of water supply, the clouds, 

 and the secondary sources, the rivers and lakes. Diagrams, models and 

 a relief map show the variations in rainfall at different points in the 

 United'States. Relief maps of the region about Clinton, ^lassachusetts. 

 before and after the construction of the Wachusett Reservoir for the 

 w^ater-supply of Boston, show the way in which surface water supplies 

 are collected by impounding streams, and a model of a well sunk through 



