172 BOARD OF AGRICULTURE, 



perfect condition, or the eggs matured in the intestines may be 

 thrown into the stomach in vomiting. 



The same may, in rare instances, occur in the strictly herbivorous 

 animals, yet the likelihood of such occurrences is not great. 



The fact stands thus : the cestoid worm which occurs in the 

 sheep (Coenurus cerebralis), is naturally destined to become a tape- 

 worm in the intestines of the dog. ■ Some latitude is, however, 

 possible, for if the cestoid worms, which are formed in the pig, in 

 the sheep, or in the ox, find their way into the stomach of the dog 

 or into that of man, the development will go on. Many feeding 

 experiments have shown, however, that the different species are 

 confined within narrow limits. 



Perhaps the most remarkable case of Alternate Generation is 

 exhibited by the Ascaris nigrove:iosa. In the lung of the frog 

 these are found to produce viviparously. The very minute young 

 pass into the intestines. When they are set free they pass into 

 the moist earth and become little snake-like organisms, which 

 develop into males and females. The eggs produced by these, 

 when placed in the frog's mouth pass into the lung, where they 

 develop into the viviparous form again, which appears to be 

 hermaphrodite. 



Here then is an alternation of monoecious and dioecious genera- 

 tions, together with a surprising metamorphosis 1 



Lecture by Dr. George B. Loring of Salem, Mass., on 



Raising Neat Stock. 



Gentlemen: — The importance of a judicious selection of cattle 

 for our farms is fully recognized by all who take an interest in 

 agriculture. The domestic anifnals are man's allies and partners 

 in the tillage of the earth. And of them all, none are so intimate- 

 ly connected with all farming operations, as the many breeds of 

 horned cattle. In their various forms they constitute a large 

 proportion of our agricultural capital. 



There is an old French proverb, " no cattle, no farming — few 

 cattle, poor farming — many cattle, good farming." And we learn 

 that when Cato, the wise and sagacious Roman, was asked- — 

 "what was the most assured profit arising out of the land?" made 

 answer — "To feed stock well." Being asked again, " What was 

 the next?" he answered, "To feed with moderation." And we 

 can easily imagine the contrast which exists between that aborigi- 



