the top of the rock for a few moments, and then scud 

 up the stream. There seems to be a peculiar instinct 

 in them to aim at this very point ; for the force of the 

 stream on the top of the precipice is less at the bottom, 

 close to the rock than on the surface. It is almost in. 

 credible the height to which they will leap, they fre- 

 quently leap near twenty feet. The manner of their 

 doing it is, by bending their tails round, almost to> 

 their heads ; it is then by the strong re-action of their 

 tails against the water, that they spring so much 

 above it, 



13. One particular instance of the divine care, is ob- 

 servable in the Turbot. He is not well able to swim, 

 especially in stormy weather ; he must then keep at 

 the bottom, and stick in the sand, and for that reason 

 he is provided with a skin or membrane which draws 

 over his eyes, to keep the sand out of them* 



Whales are as many degrees raised above other 

 fishes in their nature, as they are in their size. They 

 resemble beasts in their internal structure, and in some 

 of their appetites and affections. They have lungs, a 

 midriff^ a stomach, intestines, liver, spleen, bladder, 

 and parts of generation like beasts ; their heart also 

 resembles that of beasts driving red and warm blood 

 in circulation through the body. 



As these animals breather the air, they cannot bear 

 to be long under water. They are constrained every 

 two or three minutes to come up to the surface to take 

 breath, as well as to spout out through their nostril 

 (for they have but one) the water which they sucked 

 in while gaping for their prey. 



The senses of these animals seem also superior to 

 those of other fishes. The eyes of other fishes are 

 covered only with that transparent skin that covers 

 the rest of the head ; but in all the cataceous kinds 

 they are covered by eye-lids as in man : this keeps that 

 organ in a more perfect state, by giving it intervals 

 of relaxation. The other fishes that are very star in g^ 



