said to possess another sense agreeing 

 with our own solely in the medium by 

 which it is excited." 



The human ear is capable of hear- 

 ing musical sounds produced by vibra- 

 tions ranging from twenty-four in a 

 second of time to forty thousand. 

 This indicates that humanity is con- 

 fined in interest to the motions of the 

 atmosphere within these limits. The 

 possibilities of higher and lower fields 

 of music are such that one writer has 

 said that it may be that the air about 

 us is constantly resounding to the 

 music of the heavenly hosts while our 

 dull ears with their limited powers are 

 unable to catch the poorest note in 

 that celestial harmony. 



Sound travels about one thousand 

 ninety feet in a second in the air. 

 Through other elastic mediums it 

 varies in speed. The beholder of an 

 explosion of dynamite in a harbor, 

 receives three shocks, one coming by 

 way of the air, another by water, and 

 the third through the earth, all 

 arriving at different times. 



It is a fortunate thing that low 

 sounds travel as rapidly as high ones 

 and loud sounds no faster than soft 

 ones. Thus the playing of a band 

 upon the water, at a distance, is beau- 

 tiful, because all the tones powerful 

 enough to reach the listener do so at 

 the right time to preserve harmony. 

 If it were not for this equality in 

 traveling power, no music on a grand 

 scale could be possible, for those sitting 

 at a distance from the performers would 

 be in a sea of discord from the late 

 arrival of tones which should have 

 blended with those gone before. In spite 

 of the fact that our highest appreciable 

 note is but one-third of an inch in 

 length of wave and the wave of our 

 lowest note exceeds forty feet in length, 

 all soimds produced in harmony travel 

 in harmony till exhausted in space. 



The ears of various animals are beau- 

 tifully adapted to their respective 

 habits. The watch of the Do2r is most 



valuable because distant noises are so 

 readily detected by his faithful ear. 

 The Thrush has been observed hop- 

 ping along the ground with frequent 

 stops to listen. So keen is his hearing 

 that the presence of a Worm below the 

 surface is detected by the sound of the 

 Worm's occupation. By judiciously 

 beating the ground he brings the 

 Worm toward the surface as if to 

 escape its enemy, the Mole. At the 

 proper instant the turf is torn up and 

 nearly always the Worm secured. 



The form of the outer ear is adapted 

 to the needs of the animal. Most 

 grass eating animals have ears that 

 turn readily in all directions to listen 

 for enemies, but the ears of flesh eating 

 animals that pursue their prey are set 

 only to reach forward to hear the 

 sounds of escaping prey. 



Many insects and lower orders of 

 animals are looked upon by man as 

 incapable of the pleasures of hearing. 

 But this is often a mistake. Snails 

 have been known to enjoy the voice of 

 their human friends and come forth 

 when called by familiar voices. 



The fondness of the Cobra for music 

 and the powers of charming this 

 hideous animal partly by appealing to 

 his esthetic hearing are well known. 

 Moths have good hearing as one may 

 observe while walking in the woods 

 where the crackling of dry sticks 

 alarms them so they fly up from their 

 noonday slumbers in great numbers. 

 The antennae of the Butterfly are 

 supposed to act as hearing organs. 

 Crabs and Shrimps hear with their 

 inner antennae, Clams with their feet, 

 and some of the Crustacea with the 

 bases of the lobe of the tail. 



Many animals seem to enjoy the 

 voice of man and the sounds of the 

 various musical instruments which he 

 uses. Frogs and Toads may be taught 

 to know their master's voice. Canaries, 

 Parrots, and Doves enjoy human sing- 

 ing and instrumental music as well. 

 A WooQchuck has been known to 



