PREFACE 
The publication of this revised and extended edition of 
the Guide to the Zoological Park is necessary in order to 
bring our most important collections down to date. By 
slightly anticipating the completion of the Zebra Houses 
and Eagle Aviary, and including them herein, we are now 
able to offer a Guide Book to the Zoological Park as prac- 
tically completed. 
The visitor is not to understand, however, that with the 
completion of the features named above nothing more will 
remain to be done. <An institution of this kind never 
reaches a state of absolute completion, with no further 
possibilities of improvement. But the building of boundary 
walls, and the rebuilding of temporary entrances, are mat- 
ters of small moment in comparison with the completion of 
a grand series of installations for animals, and buildings 
for public comfort. 
Few indeed are the persons who know, or who ever will 
know, the extent to which both the general design and the 
details of the Zoological Park have been originated, and 
hammered out of the raw materials. From the inception 
of the undertaking, the work of development has involved 
a continuous struggle to meet new conditions. Although 
precedents and models for things to be done were sought 
far and wide, in all save a very few instances, our needs 
were so peculiar, and so different from those of other 
zoological gardens and parks, we have found really very 
little that we could copy. The abundant-room idea on 
which the Zoological Park was founded, and our desire for 
the full utilization of the works of nature, have from the 
first taxed the creative faculties of the Society to the ut- 
most. 
It has been gratifying to find in other zoological estab- 
lishments a number of features which we could utilize here, 
thereby saving ourselves something in the eternal grind of 
invention and experiment, and we have gladly made prom- 
inent mention of such cases. 
While it is possible to complete the equipment of animal 
installations for a Zoological Park, and fill them with fine 
collections, the demand for more animals is continuous. 
Our wild creatures are not immortal; and, like human be- 
ings, they live out their allotted lives and pass away. The 
great majority do not perpetuate themselves in captivity, 
