No. 144.] 14a 



CARPOLOGY, OR FORMATION OF FRUIT. 

 Fruits may be formed by one Jlower or by several Jlowers com- 

 bined- 

 Time of maturing — ripening in some plants and fruits : 



Grasses, from 1 3 to 45 days. 



Raspberry, strawberry, cherry, 2 months. 



Roses, white thorn and horse chestnut,.... 4 do. 

 Vine, pear, apple, w^alnut, beech, plum, nut, 



almond, from 5 to 6 months. 



Olive, 7 months. 



DEPTH OF PLANTING. 



[ByPF.TRI.] 



Seed buried, ^ inch deep, up in 1 1 days, 7-8ths of them. 



1 do do 12 do all of them. 



2 inches deep, do IS do 7-8thsof them. 



3 do do 20 do 6-8ths do. 



4 do do 21 do 4-8tlis do. 



5 do do 22 do 3-8ths do. 



6 do do 23 do only one came up. 



The rays of the sun furnish light ; those nearest the yellow are 

 remarkable for impeding the gei mination of seeds; while the red 

 or heat giving rays are favorable to it, if plenty of water is pre- 

 sent ; while the blue rays, or those concerned in chemical action 

 or actinism (from the greek adhi^ a ray) accelerate the process and 

 cause a rnpid growth. His experiments were making the sunlight 

 pass throught colored glasses upon the vegetables. He thinks 

 that blue glass in a conservatory will prevent scorching of leaves, 

 and that red glass will increase the heat. He says that a pale 

 green glass, made with oxide of copper, is best fitted for conser- 

 vatories, green being a compound of the yellow or luyninous rays 

 with the blue or chemical rays. A delicate emerald green glass 

 has, at his suggestion been used in glazing the large palm house 

 at Kew. 



COLORS OF FLOWERS. 

 Those of the common pink Phlox are light blue early in the 

 morning, and afterwards bright pink, as the sun advances. Those 

 of the (Enothera tetraflora are white in the morning, and red at 



