its twentieth year, 100 per cent., tint is, that the 

 acre will, after the expiration of that period, 

 yield a foliage competent to the sustenance of 

 upwards of a million of worms, and this will not 

 be doubted, when it is considered that the acre in 

 hedge-form, six feet wide apart and \\ asun- 

 der in the rows, will contain 4,840 plants as 6 

 X 1| is equal to the square of 9, and that being 

 divided into 43,560, the number of square feet in 

 an acre, gives 4,840, as : 

 9)43.560 



4,840 No. plants on an acre 6 

 feet by 1 1. 



Mr. Frost, of Massachusetts, fed 1,500 worms 

 on 75 Ibs. of leaves, which precisely corresponds 

 with the average of food as laid down by Count 

 Von Hazzi, of Munich. He pays :. 



On an average twenty thousand worms require 

 in the 1st period 5 Ibs. of leaves 



2d 



3d 



4th " 



5th " 



15 



46 



139 



795 



Ibs. 1,000 



And he observes, further, that 



" Until lately, twice as much would have been 

 consumed in Germany, in consequence of the 

 errors which attended the rearing of worms, their 

 feeding, the economy of the leaves," &c- 



Count Dandola estimates that about 37 Ibs. 12 

 oz. will feed 1,000 worrng, but we take the larger 

 number, as we wish to make a liberal allowance 

 for wasteage and other contingences. 



4. Mr. Fitch speaks of a full grown tree, 

 which yielded food for worms, which made four 

 pounds of silk, and as 3,000 is the general av- 

 erage for a pound of silk, there must have been 

 12,000 fed on this one tree. 



Mr. Fitch also states, that an acre of full 

 grown trees, set one and a half rods apart, will 

 produce 40 Ibs. of silk. 



4. Mr. Tufts confirms this calculation, but does 

 not state the distance at which the trees stood 

 from one another. 



6. Mr. Storrs says, that a full grown tree will 

 feed 6,000 worms, which will produce one and a 

 half pounds of silk. An acre of trees will pro- 

 duce 60 Ibs. of raw silk in one season. 



7. Mr. Smith states, that a full grown tree will 

 feed 5,000 worms. 



8. Mr. R. Falley, now of Ohio, had 18 Ibs. of 

 silk from about 100 trees, part of which were 

 young, in Massachusetts," 



9. It is stated in the Columbian Magazine, 

 that in the year 1789, nearly four pounds were 

 produced from seven trees, and one pound from 

 eight trees, eight years old, from the seed. 



10. According to Count Dandolo, it is a cer- 

 tain fact, that, if silk worms are well managed 



21 Ibs. of Mulberry leaves will be sufficient to 

 obtain a pound and a half of cocoons, and that in 



Dalmatia he obtained a pound and a half of co- 

 coons from 15 Ibs. of leaves, which yielded a 

 pound and a half of silk, and he further affirms 



hat 97J Ibs. of leaves will produce 1\ Ibs. of co- 

 coons. For the yield of the trees we take Bai- 



iff Hout's estimate, 200 Ibs. of leaves to the full 

 grown tree. 



11. Miss Rhodes could scarcely support ten 

 thousand worms on the leaves of twelve large 



rees in England. 



12. According to Lambruschini, 100 Ibs. of 

 clear leaves will feed worms which will produce 

 6 Ibs. of silk. 



13. Mr. Genet, the former French. Minister to 

 this country, in his Memoirs on the subject of 

 silk states, that" A small hedge that will occupy 



he twentieth part of an acre, being planted with 

 jushes not more than three years old will sup- 

 aly and accommodate 100.000 worms, the pro- 

 duce of which will be thirty pounds of raw drawn 

 silk, and if the whole acre is planted in the same 

 way, the produce will be six hundred pounds, 

 which if merely spun into sowing silk would 

 amount at the present price of American sewing 

 silk at Albany, [then] three dollars per pound, to 

 " ,800." 



14. Mr. Daniel Bradley, of Marcellus, New 

 York, estimates that an acre of ground will yield 

 foliage enough for a million of worms, and that 

 some go so far as to say that it will support two 

 millions. 



15. On the authority of the Hamilton County 

 (Ohio) Agricultural Society, as we have before 

 stated, it is affirmed that four young ladies in 

 Massachusetts, gathered as many leaves off of 4 

 acres in 1833, as fed worms which made them 

 420 Ibs. of silk, besides attending to the domes- 

 tic concerns of the household. 



16. The late Mr. Parmentier, of New York, 

 a distinguished Nursery-man and Horticulturist, 

 stated that an acre of Mulberry trees, when full 

 grown, would yield foliage enough to feed worms 

 that would produce 490 dollars worth of silk. 



REMARKS UPON THE PRECEDING. 



We have prepared in a succeeding page, a ta- 

 ble, shewing the produce per acre, according to 

 the respective statements and data of the several 

 persons given under the preceding head, and in 

 order that the reader may understand the princi- 

 ples upon which our several calculations are 

 made, we will briefly explain each, as they res- 

 pectively stand in numerical order. 



No. 1. Mr. Hout states that a tree 20 years 

 old will yield 200 Ibs. of foliage, and we calcu- 

 late, as 108 trees, 20 feet square apart, can stand 

 on an acre of ground, the acre will yield 21,600 

 Ibs. of leaves. Again he says, 700 Ibs. of leaves 

 will produce 40 Ibs. of cocoons, and, therefore, 

 21,600 Ibs. will produce 1234 Ibs/, then, as 



