350 



BOARD OF AGRICULTURE. 



Potassium oxide . 

 Sodium oxide 

 Calcium oxide 

 Magnesium oxide 



vn. 



Analysis of the Stems of the Grapes. 



One hundred parts of the stems of the Concord grapes in 

 an air-dry state contained 9.64 per cent of moisture and 1.182 

 parts of nitrogen : they left by calcination 4.688 parts of ash, 

 which contained in one hundred parts the following mineral 



elements : — ■ 



vm 



Analysis of the Young Branches, with Tendrils and Blossoms, collected 



June 15, 1876. 



Moisture lost at 100° to 110° C, 80.80 per cent ; dry mat- 

 ter, 19.20 per cent. 



One hundred parts of their ash contained, — 



Potassium oxide 

 Sodium oxide . 

 Calcium oxide . 

 Magnesium oxide 



Per cent. 



24.7102 



.9442 



40.5302 



10.6611 



Per cent. 

 Ferric oxide . . . 1.0773 

 Phosphoric acid . . 17.1590 

 Matter insoluble in dilute 



hydrochloric acid . . 4.9180 



The above tables give a very clear idea of the distribution 

 of the essential mineral elements in the various parts of 

 the Concord grape at the end of the season, and it would 

 seem that these elements must have their peculiar influence 

 upon the formation of each part where found in large 

 quantities. 



To more thoroughly understand the condition of the fruit 

 in its growth during the season, analyses were made at inter- 

 vals in 1876, and tests applied to determine the amount of 

 sugar and acid. The tests were made at times when there 

 was a distinct change or maturing of some part of the 

 vine. 



