CASSELL'S POPULAR NATURAL HISTORY. 



progression. Of all carnivorous quadrupeds, they have the greatest variety of modulations of voice. 

 They bark, bay, howl, yelp, whine, cry, grunt, and snarl, according to their emotions. 



The dog never perspires, but when heated lolls out its tongue, and salivary fluid drips from its 

 mouth. It repeatedly turns round before lying down in the chosen spot ; it is capable of sustaining 

 hunger a long time, but often requires drink. The number of young at a litter varies from four to 

 eight. They are born blind, and the eyes are not opened till the tenth or twelfth day. The dog is 

 adult at the age of three years, and rarely lives longer than about fifteen years. 



Dogs are prone to dream. Thus Lucretius says : 



" And oft, when sleep is soft, the dogs of chase 

 Move their limbs suddenly, and send forth sounds, 

 And draw in inspirations from the air, 

 As if they followed still the tracks of game; 

 Aroused, they seek the empty images 

 Of stags, as if they saw them fall in flight, 

 Till all proves vain, they sink into themselves." 



This is true. At such times they may be observed to move their feet, make efforts to bark, and 

 so greatly agitate themselves, that the hair rises on the flanks, and the skin becomes clammy. 



There are certain characteristics of a high-bred dog, whatever the race to which it belongs, which 

 are worthy of particular notice. These are : A large and full eye, not linear or oblique, but bold and 



sparkling ; a neck well raised from the breast ; high 

 shoulders, thrown back, with the humeral joints promi- 

 nently marked ; the breast broad ; the chest deep ; the 



SKI 1,1, OF A DOG. 



SMALL SKULL 



loins arched, broad, and muscular; the tail gradually tapering; the limbs clean, sinewy, and firm ; 

 the feet cat-like and rounded ; the tarsus, or length from heel to foot, .short ; the thighs muscular and 



1IKAI) or A DOC, FROM 



AN EGYPTIAN 



TAINTING. 



DOG ON A BABYLONIAN SKAI.. 



WOLF-DOG, ON AN 



KTHl'SfAN COIN. 



SMALL DOG, ON SICILIAN 

 .Me i\KY IN TIIK 

 MIIHM.K A<;i:.s 



i I buck ; no superabundant loose skin about the body, nor any thick joints disproportionate lo 



muscle. The well-bred dog, from the rough collie of the mountain shepherd to the sleekest hound 



