AMERICAN FERTILITY OF INVENTION. 279 



sheep. The annual sale of poultry and game amounts 

 to 8,000,000 francs ; of fish, to 4,000,000 ; oysters, 

 1,000,000; and of fresh-water fish, to 600,000 francs. 

 INVENTIONS. (British Farmer's Magazine, Feb. 

 1832.) By an official document laid before the Con- 

 gress of the U. S. America, it appears that no less than 

 six thousand inventions have been secured by patent 

 since the establishment of the patent office in 1793. 

 The plough has been made to undergo one hundred 

 and twenty-four improvements. One hundred and 

 nineteen threshing machines have been invented. That 

 great problem, the extraction of butter from cream, 

 without fatigue to the operator, has been solved in 

 eighty ways, by the inventors of eighty different 

 churns. Four new machines have also been invented 

 for paring apples. 



