34 



We now propose to make a few calculations, in 

 order that the reader may more fully compre- 

 hend the table just given, and those which may 

 follow. 



It is computed by Mr. D'Homergue, that a tree 

 6 years old, will yield 30 Ibs. of foliage, and that 

 they may be planted 6 feet square apart, which 

 would give us 1,210 trees on an acre, there 

 being 43,560 square feet in an acre, as 

 6 

 6 



Square of 6, 36 ) 43560 ( 1210 No. of trees on 

 36 an acre at 6 ft. square apart. 



75 



72 



36 

 36 



Thus then, if there be 1,210 trees on an acre, 

 yielding 30 Ibs. of leaves to the tree, they will 

 give foliage enough to support 726,000 worms, 

 and as 3,000 cocoons will yield a pound of silk, 

 so will the gross number give 243 Ibs., as for ex- 

 amples : 



1210 trees on an acre, 



30 Ibs. foliage to each tree, 



36,300 Ibs. of leaves on an acre. 

 It has been proved by the actual experiments 

 of several silk culturists, indeed, we might say, 

 by universal experience, that 50 Ibs. of leaves 

 will support 1,000 worms during the feeding 

 season. 



The question may be therefore thus stated : 

 If 50 Ibs. of leaves feed 1,000 worms, how 

 many worms will 36,300 Ibs. of leaves feed. 

 If 50100036,300 



1000 



5,0)36,30000,0 



726,000 worms. 

 Again, if 3,000 cocoons make a pound of silk, 

 how many pounds will 726,000 make. 

 If 3,0001726,000 

 1 



3,000) 726,000 



Amount raised on an acre } 

 according to Mr. D'Hom- > 242 Ibs. of silk. 



ergue's statement, 



Gross value of an acre in 

 silk culture, 



per Ib. present 

 selling price 



We have no doubt, ourself, that this amount 

 might be realized, and even mere, from an acre 

 in the silk culture, properly attended to, in the 

 hedge-form, but as we do not wish to excite over 

 sanguine expectations, we have assumed data 

 even less than that justified by the actual experi- 

 ments, or rather practical business results, of 

 Count Dandolo, one of the most intelligent 

 among the Italian silk culturists. The following 

 examples will show the amounts produced by 

 that gentleman, according to his statement, as per 

 No. 10 in the table. 



There being 108 trees on an acre, each bear- 

 ing 200 Ibs. of leaves, the whole will yield 21,- 

 600 Ibs. of foliage, as 



108 number of trees on an acre 

 200 number of pounds per each tree 



21,600 Ibs. the produce of an acre. 



As Count Dandolo says, that 21 Ibs. of leaves 

 will yield 1 J Ibs cocoons, so will 21,600 Ibs. of 

 leaves give 171 Ibs. of cocoons; as 



If 21 \\ 21,600 



2 3 



3 21) 64800 

 2) 3035 



1542 Ibs. of GO'S. 



As 9 Ibs. of cocoons give 1 Ib. of silk, so will 

 1542 Ibs. of cocoons yield 171 Ibs. of silk; as 

 If 9_i_i542 

 1 



9) 1542 



171 Ibs. of silk. 



Again Count Dandolo has obtained li Ibs. 

 of cocoons from 15 Ibs. of leaves: this will give 

 us the following as the product of an acre's cul- 

 ture. 



If 15 11 21,600 



3 15) 64800 

 2) 4320 



9) 2160 



240 

 And again he says, that 97| Ibs. of leaves 



