42 



the egg's in cold storage and their artitieial incubation, since the warmer 

 temperature of these islands will not permit normal hatchings under 

 natural conditions. 



Two breeding experiments have been conducted at the station, one 

 under natural conditions and the other with eggs imported in cold 

 storage and kept on ice until ready for hatching. The results of 

 these experiments are given in the following tables and illustrate in 

 the first instance the variability of hatching and development under 

 natural conditions and in the second experiment more encouraging 

 results under artificial conditions. 



The introduction of the eggs and their hatching by some one person 

 understanding their proper manipulation and having the distribution 

 of the worms to the individual growers would prevent a repetition of 

 the failure several persons have met with who have sought to estab- 

 lish the industry in Hawaii. After further work a more careful and 

 detailed consideration of the question will be published by this station. 



In the first table the silkworm eggs were received by mail from 

 Tokyo, Japan, whence they were forwarded December 12, 1904. In 

 the second table the eggs were forwarded from Washington, D. C, 

 in cold storage March 6, 1905, and removed from the ice April 1, 1905. 



Variable hatching and development of ailkworm eggs shipped tinder normal conditions. 



On January 23 the eggs were hatching very slowly, and full}^ one- 

 third were thrown awa3\ The mean maximum temperature from 

 January 1 to February 25 was 78.9° and the minimum 62. Y° F. The 

 sk}" was almost uniformly clear during the whole time. 



Uniform hatching and development of silkivorm eggs shipped in cold storage. 



Date of hatehinj; 



Apr. 2 

 .\ pr. 3 

 A [jr. 4 



Weight 



of 

 cocoons. 



Lbn. ozs. 

 10 3 

 14 10 

 12 15 



The mean maximum temperature during the growing period was 

 78.84° and the minimum was (MV V. The weather was ])artly cloud}^ 

 most of the time. The silkworms were killed with fumes of carbon 



