 | William Gilpin - 1834 - 436 стор.
...the foot of each tree, and the sap, which drops into it from the tubes, is every day collected, and poured into casks, from which it is drawn out to fill...The evaporation is kept up by a brisk fire, and the surface is carefully skimmed during this process ; fresh sap is added from time to time, and the heat... | |
 | Jacob Bigelow - 1840 - 418 стор.
...they impart to the liquid the coloring matter and bitter principle, with which they are impregnated. poured into casks, from which it is drawn out to fill...brisk fire, and the scum is carefully taken off during (his part of the process. Fresh sap is added, from time to time, and the heat is maintained, till the... | |
 | New Brunswick. House of Assembly - 1847 - 136 стор.
...a birch tree hollowed out like a canoe. The evaporation is kept up by a brisk fire, night and day, and the scum is carefully taken off during this part of the process. Fresh sap is added from the reservoir as required, and the heat is maintained until the liquid is reduced to a syrup, after... | |
 | John Howard Hinton - 1850 - 1008 стор.
...sap to take place at this depth. It is also usual to insert the tubes on the south side of the tree. A trough is placed on the ground at the foot of each...Fresh sap is added from time to time, and the heat is retained till the liquid is reduced to a syrup ; after which it is left to cool, and then strained... | |
 | Jacob Bigelow - 1853 - 424 стор.
...foot of each tree, and the sap is, every day, collected and temporarily n. 29 xn. poured into caskj, from which it is drawn out to fill the boilers. The...heat is maintained, till the liquid is reduced to a sirup, after which it is left to cool, and then strained through a blanket, or other woollen stuff,... | |
 | Francis Peyre Porcher - 1863 - 644 стор.
...insert the tubes on the south side of the tree ; but this useful hint is not always attended to. 6 81 "A trough is placed on the ground at the foot of each...up by a brisk fire, and the scum is carefully taken oft' during this part of the process. Fresh sap is added from time to time, and the heat is maintained... | |
 | Francis Peyre Porcher - 1863 - 640 стор.
...south side of the tree ; but this useful hint is not always attended to. 6 . "A trough is placed ou the ground at the foot of each tree, and the sap is...up by a brisk fire, and the scum is carefully taken oft' during this part of the process. Fresh sap is added from time to time, and the heat is maintained... | |
 | Francis Peyre Porcher - 1869 - 800 стор.
...to insert the tubes on the south side of the tree; but this useful hint is not always attended to. " A trough is placed on the ground at the foot of each...time, and the heat is maintained till the liquid is re87 duced to a syrup, after which it is'left to cool, and then strained through a blanket, or other... | |
 | William H. Ablett - 1880 - 490 стор.
...poured into casks, from whence it is drawn out to fill boilers of a capacity of about eighteen gallons. The evaporation is kept up by a brisk fire, and the scum carefully skimmed off. Fresh sap is continually added, and the heat maintained till the liquid is reduced... | |
 | Jacob Bigelow - 1840 - 422 стор.
...the ground, at the foot of each tree, and the sap is, every day, collected and temporarily n. 29 xu. poured into casks, from which it is drawn out to fill...heat is maintained, till the liquid is reduced to a sirup, after which it is left to cool, and then strained through a blanket, or other woollen stuff,... | |
| |
The evaporation is kept up by a brisk fire, and the scum is carefully taken oft' during this part of the process. Fresh sap is added from time to time, and the heat is maintained till the liquid is reduced to a syrup, after which it is left to cool, and... 
