A treatise on the origin, progressive improvement, and present state of the silk manufacture / [Anon].

  • Porter, George Richardson, 1792-1852.
Date:
1831
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the origin, progressive improvement, and present state of the silk manufacture / [Anon]. Source: Wellcome Collection.

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    CHAP. V. GATHERING AND SORTING COCOONS. Method of gathering. — Sorting. — Selecting for Seed. — Proportion set apart for breeding. — Methods of destroying Vitality of Chrysalides. — By the Solar Rays. — In Ovens. — By Steam Heat. — Preservation of Cocoons. — Separation of damaged. — Good Cocoons. — Pointed Cocoons. — Cocalons. — Dupions. — Soufflons.—Perforated Cocoons. — Choquettes. — Calcined Cocoons. — Their relative Value. — Proportion of pure Silk in Cocoons. — Proportional Weight of Eggs and Cocoons; and of Mul- berry-leaves. — Quantity of reeled Silk from each Cocoon. — Weight &nd Size. — Labour required. — Deductions. - , Page 143 CHAP. VI. DISEASES OF SILKWORMS. Generally result from bad Treatment. — Silkworms frequently reared in Cottages of Peasants. — Count Dandolo. — His great Improvements.— Dandolieres. — Mephitic Air. — Moisture. — Experiments. — Jaundice.— Remedy. — Chlorine Gas. — Chloride of Lime. — Fumigation. — Light not injurious.—Description of Apartments allotted to Silkworms in Cot- tages. — 111 Effects which arise to their Attendants. - 154 CHAP. VII. ATTEMPTS TO SUBSTITUTE OTHER FOOD FOR MULBERRY LEAVES IN REARING SILKWORMS. Doctor Bellardi’s Experiment. — Lettuce-leaves. — Comparative Produce of Worms fed with these and with Mulberry-leaves. — Miss Rhodes’s Ex- periments. — Lettuce-leaves successfully used in a Hot-house. — Mrs. Williams’s Experiments. — Natural Antipathy of Silkworms. — Leaves of Scorzonera. — Recent Attempt to rear Silkworms in England. — Aban- doned for want of sufficient and appropriate Food. - - 161 CHAP. VIII. ' ATTEMPTS TO PRODUCE SILK FROM DIFFERENT ANIMATE CREATURES. The Spider. — Discovery by Mons. Bon. — Manner of Spiders producing their Web. — Power of producing this of various degrees of Tenuity.— Great number of Fibres composing one Filament. — Different Kinds of Threads. — Spider Bags. — Silk made from these by Mons. Bon. — Manner of its Preparation. — Great comparative Advantages adduced by Mons. Bon. — His Spider Establishment. — Investigations by Reaumur. — His Objections.—Small Produce of Silk from Spiders. —The Pinna. — De-