64 
Importation of raw silk in the United States, 2 
Import duty on raw silk recommended, 2 
Incubators for hatching eggs, 19 
Ladder, Cocooming, 24 
Larva of Silk-moth, see Silk-worm 
Lettuce leaves as food for young worms, 59 
Maclura aurantiaca, 3, 58 
Maillot’s method of examining the chrysalis, 43 
Market for cocoons, necessity of establishing, 2 
Mean size of a skein, determination of, 53 
Micropyle of egg, 11 
Molting of the worms, 12, 27 
Morus alba, 56 
japonica, 56 
moretti, 56 
multicaulis, 56 
nigra, 56 
parvifolia, 56 
rosea, 56 
rubra, 56 
tartarica, 56 
Moch of the Silk-worm, 14 
Copulation, 46 
Description of, 15 
Distinguishing the sexes, 46 
Examining for pébrine, 46 
Mode of issuing from the cocoon, 14 
Mulberry leaves, Constituents of, 57 
Bag for gathering, 24 
Mulberry Silk-worm superior to other silk worms, 
1 | 
Mulberry tree, 56 
Black, 56 
Paper, 57 
Red, 56 
Russian, 57 
Small-leaved, 56 
White, 56 
Muscardine, a disease of silk-worms, 3d 
A fungus its cause, 33 
Means of preventing its spread, 33 
Symptoms, 33 
Muslin bags used as cells for egg-laying, 44 
Mvycoderma aceti, 38 
Obstacles to silk-culture in the United States, 1 
Organzine, 49 
Osage Orange as food for Silk-worms, 3, 58 
Paper Mulberry tree, 57 ® 
Pasteur’s investigations of pébrine, 35 
method of examining the stomach of 
chrysalids, 42 
system of microscopical selection, 41 
Pébrine, a disease of the Silk-worm, 34 
Examination of the chrysalis, 42 
moth, 36, 42, 46 
External symptoms, 34 
Internal symptoms, 35 
It is contagious and hereditary, 35, 40 
Maillot’s method of examining the chrysalids, 
43 
Nature of the disease, 35 
Pasteur’s investigations, 35, 41, 42 
Perforated paper for transferring worms, 23 
Profits of producing cocoons, 6 
Preface to second edition of manual, 1 
sixth edition of manual, 5 
Physical properties of reeled silk, 583 
Constituents of silk in the cocoon, 55 
Determining the elasticity and tenacity of 
raw silk, 54 
mean size of a skein, 53 
Serimeter, 54 — 
Serrell’s serigraph, 53 
Races or varieties of the Silk-worm, 15 
Taw silk, 2, 49, 54 
Definition of, 49 
Elasticity and tenacity of, 54 
Import duty recommended, 2 
Rearing of Silk-worms, 26 
Allowance of plenty of room, 2 
Arches for spinning of cocoons, 29 
Assorting cocoons, 31 
Cleanliness, 26, 29 
Food-supply, 26 
Fresh air in the rearing room, 28 
Gathering the cocoons, 30 
Guarding against double cocoons, 30 
enemies, 28 
Importance of simultaneous molting, 27 
Preparations for spinning, 29 
Temperature in the rearing room, 28, 30 
Red Mulberry, 46 
Reel, 9, 50 
Automatic, 9 
Elements of mechanism of, 50 
Serrell’s reel, 5 
Reeled silk, 49 
Physical properties of, 53 
Reeling, 6, 49 
Approximate cost of, 6 
Process of reeling, 49 
Silk reel, 9, 50 
Spun, reeled, and thrown silk, 49 
Reproduction, 41 
Cells for egg-laying, 44 
Copulation, 46 
Examination of the eggs, 46 
mother moths, 42 
Old process of obtaining good eggs, 41 
Pasteur’s system of microscopical selection, 41 
Selection of pure stock, 43 
Russian Mulberry tree, 56 
Seed, sce Egg 
; Sericaria mori, 11 
Serigraph, 53 
Serimeter, 54 
Serrell’s reel, 5 
. serigraph, 53 
Shelves for rearing worms, 20 
Silk-culture in the United States, Government 
aid to, 8 
Obstacles to, 1 
on an extensive scale, dangers in, 7 
Silk products, alteration in value of, 6 
Silk-worm, color of, 13 
Development of, 12 
Directions for rearing of, 26 
Diseases of, 32 
Enemies of, 28, 32 
Molting of, 12, 13, 27 
Physiology and life-history of, 11 
Spinning of, 13 
