7 A. M. - The sap of that red maple has not begun to flow yet. The few spoonfuls in the pail and in the hole are frozen.
These few rather warmer days have made a little impression on the river. It shows a rough, snowy ice in many places, suggesting that there is a river beneath, the water having probably oozed up or the snow blown and melted off there. A rough, softening snowy ice, with some darker spots where you suspect weakness, though it is still thick enough.
2 P. M. - The red maple [sap] is now about an inch deep in a quart pail, - nearly all caught since morning. It now flows at the rate of about six drops in a minute. has probably flowed faster this forenoon. It is perfectly clear, like water. Going home, slipped on the ice, throwing the pail over my head to save myself, and spilt all but a pint. So it was lost on the ice of the river. When the river breaks up, it will go down the Concord into the Merrimack, and down the Merrimack into the sea, and there get salted as well as diluted, part being boiled into sugar. It suggests, at any rate, what various liquors, beside those containing salt, find their way to the sea, - the sap of how many kinds of trees!
There is, at any rate, such a phenomenon as the willows shining in the spring sun, however it is to be accounted for.