TABLE OF CONTENTS, 
LETTER OF SUBMITTAL.......-.-.. S506 Gtlocincing Sas GoodedencocoEeoe ADEDebeSaKOS 
PRE BACK AL Oe SiC ON DEE DELI ON] ta5 sothitaials'ataletsetcin a cides ewe! sfenieisis s'= soa aineineiacice 
PROBA CEL O-SI XT Hee DUET ON 1 (lass nccisls pestse sistemaeiaioe 2) -ia/atsis b aein ae ewietlels 
Growing interest in silk-culture, 5—Profits of producing cocoons, 6—Approx- 
imate cost of reeling, 6—Periods of buoyancy and depression, 6—Produc- 
tion of eggs for the market, 7—Silk-raising on an extensive or on a mod- 
erate scale, 7—Advice to beginners, 8—Co-operation of silk-raisers, 8— 
Appropriation by Congress, 8—Its expenditure for experiments in silk- 
reeling, 8—Benefit of silk-raising upon small farms, 9—Explanations of 
technical terms, 10—Acknowledgment of assistance, 10. 
CHAPTER I. 
PrYSIOLOGY AND LIFE HISTORY OF THE SILK-WORM..- 22. sccce. ose snes ee-== 3 
Sericaria mori, 11—Results of domestication, 11—Different states or stages 
of the Silk-worm, 11—The egg, 11—Description of the egg, 11—The micro- 
pyle, 11—Development of the larva in the egg, 12—Hatching of the egg, 
12—Number of eggs in an ounce, 12—Color of albuminous fluid of egg 
corresponding with color of cocoon, 12—The larva, or worm, 12—Number 
of molts, 12—Time between the molts, 12—Color of the worm at different 
stages, 13—Description of a molt, 13—Color of abdominal prolegs corre- 
sponding with the color of the silk, 13—Preparations of the worm for 
spinning, 13—Elaboration of the silk, 13—Length of time in constructing 
cocoon, 14—The cocoon, 14—Description of the cocoon, 14—The chrysalis, 
14—Description of the chrysalis, 14—The moth, 14—Method of leaving 
cocoon, 14—Description of moth, 15—Differences between the sexes, 15— 
Mating, 15—Varieties, or races, 15—Varieties produced by domestica- 
tion, 15—Annuals, 15—Bivoltins, 15—Trevoltins, 15—Quadrivoltins, 15— 
Dacey, 15—Classification of commercial cocoons, 15—Lost identity of the 
old varieties, 16. 
CHAPTER II. 
WHENDERING SAND, HATCHING DHE) HGS = S-2 = 2856 See oh aaltis ce winjomenseicul cede oelns 
Chemical change of the contents of eggs after oviposition, 17—Necessity for 
circulation of air, 17—Method of wintering eggs by the Department, 17— 
Suitable moisture of the air, 17—Changes in the different kinds of egg 
during wintering, 17—Lengthening the period of hibernation, 183—Tem- 
perature for wintering eggs, 1s—Wintering small lots of eggs, 183—Pro- 
tection against enemies, 18—Importance of uniform hatching, 18—Hatch- 
ing of the eggs, 18—Incubators, 19—Tinware incubator, 19—Basket-ware 
incubator, 19, 
it 
