If the mulberry trees are on the farm where the eggs 

 are raised, two women are sufficient to gather the leaves, 

 until the fourth moulting. The worms should be fed 

 three times a day, and cleaned once after each moulting. 



In the last ten days additional help is necessary, as 

 the worms require more frequent cleaning, in consequence 

 of the greater quantity of leaves which they consume ; 

 and to prevent fermentation, and consequent sickness, 

 more attention is required at this time. 



Mr Du Ponceau has raised seven ounces of eggs with 

 only the labor of two persons, and these not employed 

 the whole of each day, except on the last ten days, and 

 some occasional help, who were employed to bring leaves 

 from the country, two miles distant. In the three first 

 weeks, one person could have done the whole business, 

 except gathering and bringing the leaves. This was 

 done in the city of Philadelphia. 



The following is the calculation of Mr D'Hornergue. 



An acre* contains 45,537 square feet. 1500 mulberry 

 trees, six years old, will produce each 30 Ibs. of leaves, 

 which makes 45,000 Ibs. An acre will contain 1500 mul- 

 berry trees, planted at the distance of twelve square feet 

 from each other. This is in case it is wished to grow 

 corn or wheat in the intervals between the trees. 

 But if the ground is to be devoted to mulberry trees alone, 

 3000 trees may be planted on an acre at six square feet 

 distance, and these at six years old will produce 90,000 

 Ibs. of leaves. Selling the leaves at half a cent per 

 pound, the purchaser gathering them, or at one cent per 



* It is evident that Mr D'Homergue does not mean the English 

 acre. 



