76 KEEPING ONE COW. 



the husbandman, the Jerusalem Artichoke is that which produces 

 the most at the least expense of manure and manual labor. Kade 

 states that a square patch of Jerusalem Artichokes in a garden was 

 still in full productive vigor at the end of thirty-three years, 

 throwing out stems from seven to ten feet in length, although for a 

 very long time the plant had neither received any care or any 

 manure. I could quote many examples of the great reproductive 

 power of the Helianthus ; I can affirm, nevertheless, that in order 

 to obtain abundant crops, it is necessary to afford a little manure. 

 * * Schwertz estimates the mean quantity of dry leaves and stems 

 at three tons, one cwt., one quarter and fifteen pounds per acre." 

 Again, p. 401 " Experiment with horses. Jerusalem potatoes 

 are held excellent food for the horse ; they are eaten greedily, and 

 he thrives on them. In this second experiment 30.8 pounds of 

 Jerusalems cut into slices were substituted for eleven pounds of 

 hay, the same theoretical equivalents being assumed for them as 

 for the common potato. The ration now consisted of hay, eleven 

 pounds; straw, five and a half pounds; oats, seven and a half 

 pounds, and Jerusalem potatoes, 30.8 pounds. Having been ac- 

 customed to this regimen for some days, the teams were weighed, 

 and having gone on for eleven days, they were weighed again : 



Team No. 1. No. 2. Both Teams. Mean per horse. 



In eleven days, gain 55 loss 33 gain 22 gain .9 



" A result which leads to the conclusion that the equivalent 

 assumed for the Jerusalem potato was correct ; the animals had 

 done their work, and gained one with another nine-tenths of a 

 pound in weight." 



Again, p. 406. "One hundred pounds of good meadow-hay 

 may be taken, as ascertained by experiment, to be equivalent to 



280 of Potatoes, by analysis equal to 315 

 280 of Jerusalems, " " 311 



400 of Beets, " " 548 



400 of Swedes (too little), " " 676 



400 of Carrots " " 383 



Again, p. 415. " One thousand parts (by weight) of the forage 

 gathered at Bechelbroun hi its ordinary state contained : 



Mineral Substances. Azote. Phos. Acid. Lime. Bone Earth. 

 Potatoes, 9.61' 3.70 1.09 .17 .33 



Beet, 7.70 2.10 .46 .54 .95 



Turnip, 5.70 1.30 .35 .62 .73 



Jerusalems, 12.47 3.75 1.35 .29 .53 



Again, p. 449. " Seventh experiment with a cow two hundred 

 and ninety days after calving. In this trial the ration consisted 



