Natural History, ofiheir Generation. 331 



Lastly, I shall make a few additions, which flow from the 

 former observations, and are the result of experiments 

 which I have no inclination to publish at present. 



§vr. 



(1) According to the course of nature, no trouts or sal- 

 mon are generated in ponds or standing waters. 



(2) They cannot be bred there if millions of pregnant 

 eggs were put into theln. 



(3) The young trouts, in the first two or three weeks, 

 are very tenacioul of life ; for after the head is dead, the 

 body will live two days before they are quite dead : this is 

 to be understood of healthy fish kept in a current of fresh 

 streaming water. . ■ , , 



(4) Although the young trouts love to swim with the 

 current, withm six weeks, out of their breeding-troughs, 

 § IV. (4), yet they can be kept within them six or more 

 weeks longer by particular manoeuvres. 



(5) They are not easily to be caught, on account of their 

 small size and nimble motion j notwithstanding they may 

 be collected in a pail.^ 



(6) They may 'then be put into a proper water, or can 

 be put through a funnel into bottles, and carried to any 

 part, provided the water do not freeze. 



(7) The ripe eggs of a trout, after they are four or five 

 <lays apparently dX^ad, and gone into a kind of putrefaction 

 so'that tht stench is intolerable, may yet be recovered, and 

 bred into fishes. 



(S) The eggs of the trout will not produce fishes so long 

 as they ri;main connected with the egg stock. 



(9) 'The natural causes wliy a hen brings a live chicken 

 into the world mav very easily be accounted for from the 

 observations I have'made in the breeding of trout. 



(!0) The natural disposition of the animalculae of the 

 sperm which enters the egg uiay be considerably increased. 



(11) I have made many experiments, in which I have 

 found that two animalculai'had slipt into the egg, and that 

 double fishes have been generated ; although tliey had two 

 bodies, thev had but one common stomach : how this hap- 

 pens, see § V. (1). ■ 



(12) Of these monstrous productions, the most of them 

 were opposite to one another, and had their stomach in 

 comn)oi\ between tlieui ; yet in a strict sense the stomach 

 only, the rest of the guts divided in about three weeks 



separately. ,- , , 



(13) Some of these double fishes were fixed by their 



sides 



