284 Vineyard Culture. 



should be provided with wooden cross-pieces. The 

 latter, made of pine wood, and cut by steam, will be 

 eight-tenths of an inch wide, four-tenths of an inch 

 thick, and four feet two inches long. They must be 

 fastened across the cloths at each end, in a seam made 

 for the purpose, and placed along the whole length, at 

 the distance of six feet apart [A, Fig. 113]. After 

 these cloths have been manufactured, it will be as well 

 to steep them in a bath of sulphate of copper, so as to 

 make them more durable. 



These cloths, with a close texture, may now be had 

 at five and one-half cents the lineal yard. Their cost 

 may be ascertained in the following manner, for a length 

 of one hundred yards. 



For a length of one hundred yards there will really be required one 

 hundred and two yards, on account of the fold to receive the 



cross-pieces, which, at five and one-half cents per yard is $5 60 



Fifty cross-pieces, at one-fifth of a cent each o 10 



Fastening the cross-pieces on the cloth o ao 



Steeping in sulphate of copper o 40 



Total 



Interest of capital, at five per cent. 



Grand total $6 60 



All the rows of plants being forty inches apart, there 

 will be required 2,200 yards of cloth, which, at $6.60 

 the 100 yards, would give rise to a preliminary expense 

 of $145.20. The duration of these sulphated cloths 

 will be about fifteen years, which gives a yearly cost of 

 $9.70 per acre, for the cloths alone. 



The sheds intended for the storage of these cloths 

 may be diminished by three-fourths, for the same sur- 



