A Practical Treatise on the Culture of Silk; Adapted to the Soil and Climate of the United States

A Practical Treatise on the Culture of Silk; Adapted to the Soil and Climate of the United States

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1839 edition. Excerpt: ...it, and are duly regarded. The exhalations arising from the litter, &c. must be very offensive and deleterious to health. Weight of Food. Various estirnates have been made of the Weight of food consumed by the Silk Worm, and the product of silk received in return. Among them is that of Count Dandolo, who calculates that 200,000 Worms will consume 7,000 lbs. of leaves, and that 21 lbs. of leaves will make 1 lb. of cocoons. Count de Hazzi calculates that the same number of Worms will require 10,000 lbs. of leaves in the following proportions. In the first age, 50 lbs.; 2nd, 150 lbs.; 3d, 460 lbs.; 4th, 1390 lbs.; 5th, 7950 lbs. M. Bonafous says, that 200,000 Worms were sustained by 7,217 lbs. leaves. The quantity, however, given them between their regular meals was not taken into the account, and the leaves were chopped during the first stages, which enables the Worm to consume them with less waste; Making Cocoons. The Worms having arrived to maturity, all that remains for them to do, is to make their cocoons; and to enable them to do this, they must be furnished 'with suitable accommodations for that purpose. Va rious plans have been contrived, but the method most commonly adopted, is to make them little arches, or cabins, of brushwood or broom corn. Several days before the time of rising, branches, with spreading tops, of chesnut, hickory, oak, or birch, are to be procured and brought to the cocoonery. As soon as the Worms give indications of rising, these are set between the shelves, with their twigs upwards.--They should be cut at proper lengths to press against the top of the bottom shelf and the bottom of the one next above it, in order that they may keep their places while the Worms are upon them. To prevent' the...show more

Product details

  • Paperback | 24 pages
  • 189 x 246 x 1mm | 64g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236891929
  • 9781236891921