| The springwood is filled with large pores, the summerwood with smaller ones. |
| It is porous, but the pores are small, except one or two rows in the springwood. |
| A given bulk of it contains more actual wood substance and less air and water than the springwood. |
| The annual rings are variable in width, and the proportionate amounts of springwood and summerwood also vary. |
| The genesis of Raspberry Plain, just north of springwood, has already been given. |
| It is usually lighter in color than that near the outer portion of the ring, and is known as earlywood or springwood. |
