No. 144.] 113 



swallow upwards of twenty of the ripe seed-balls of stramonium, 

 chewing them up with evident relish. I have seen the red bird 

 of the tropics filling his crop with the ripe red pepper pods. 



Size of the atoms of lig/it. 

 Newton's estimate of these dimensions remains, viz : 



Green, each atom is in diameter the 15 millionth part of an inch. 



Scarlet, 19 do 



Yellow, 16 do 



Orange, 17 do 



Vegetable green, 25 do 



Blue and purple, 12 and 14 do 



Sky blue, 2| , do 



Pure white as silver, 5 do 



Other whites, 1 5 to 25 do 



Black varies from ^ to 2 do 



The late experiments of Mr. Ellis prove that the green color of 

 plants arises from their nitrogenous character, that the red colors 

 are due to oxygen, and indigos and violets to hydrogen. 



Trauenhofer determined the waves of light to be as follows^ in 

 parts of an inch : 



Red, 2,582 millionths. 



Orange, 2,319 do 



Green, 2,073 do 



Blue, 1,912 do 



Indigo, 1,692 do 



Violet, 1,572 do 



The intermediate spaces are black, but when these colors mingle 

 they form white. 



[Assembly No. 144. J H 



