Transactions of the Society for the Promotion of Useful Arts, in the State of New-York, Volumen 4 |
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Página 19
... surface of the leaves ; while the proper vessels originate on the under surface in a like incal- culable number.§ In the process of circulation , the sap appears to be absorbed , by the common vessels , at the extremities of the roots ...
... surface of the leaves ; while the proper vessels originate on the under surface in a like incal- culable number.§ In the process of circulation , the sap appears to be absorbed , by the common vessels , at the extremities of the roots ...
Página 20
Society for the Promotion of Useful Arts. at the surface of the bark and in the internal cells . It follows the course of these vessels , through the stem and branches into the leaves . Here , in delicate and diffused vessels , it is ...
Society for the Promotion of Useful Arts. at the surface of the bark and in the internal cells . It follows the course of these vessels , through the stem and branches into the leaves . Here , in delicate and diffused vessels , it is ...
Página 37
... from the earth , resembling the lacteals of animals ; —those which open on the external surface of the bark and leaves , to absorb moisture from the atmosphere , like the cutaneous lymphatics ; -and those which open into.
... from the earth , resembling the lacteals of animals ; —those which open on the external surface of the bark and leaves , to absorb moisture from the atmosphere , like the cutaneous lymphatics ; -and those which open into.
Página 38
... surface ; much less can it cause the fluid to overflow the tube , as it was found to do in the experiments alluded to . The force of capillary attraction is inadequate to account for the force and velocity with which the sap ascends ...
... surface ; much less can it cause the fluid to overflow the tube , as it was found to do in the experiments alluded to . The force of capillary attraction is inadequate to account for the force and velocity with which the sap ascends ...
Página 39
... surfaces alone , bears a greater ratio to the surface of the bark of the tree , than the internal surfaces of the air - cells of the lungs bear to the external surface of the animal . The changes produc- ed on the air during this ...
... surfaces alone , bears a greater ratio to the surface of the bark of the tree , than the internal surfaces of the air - cells of the lungs bear to the external surface of the animal . The changes produc- ed on the air during this ...
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Página 125 - ... in any other situation. The spectator must stand with his back to the east, in some elevated place behind the city, that he may command a view of the whole bay ; beyond which the mountains of Messina rise like a wall, and darken the back-ground of the picture. The winds must be hushed, the surface quite...
Página 125 - Calabrian coast grew quite smooth, and in an instant appeared as one clear polished mirror, reclining against the aforesaid ridge. On this glass was depicted, in chiaro scuro, a string of several thousands of pilasters, all equal in altitude, distance, and degree of light and shade. In a moment they lost half their height, and bent into arcades, like Roman aqueducts. A long cornice was next formed on the top, and above it rose castles innumerable, all perfectly alike. These soon split into towers,...
Página 265 - In using the ointment, begin at the head of the sheep, and, proceeding from between the ears along the back to the end of the tail, the wool is to be divided...
Página 73 - ... peach, the apple, pear, and quince. The instinctive sagacity of these creatures directs them especially to the fruits most adapted to their purpose. The stone fruits more certainly perish by the wounds made by these insects, so as to fall in due time to the ground, and afford an opportunity to the young maggot to hide itself in the earth. Although multitudes of these fruits fall, yet many recover from their wounds, which heal up with deeply indented scars.
Página 177 - I add to the thin covering of straw put on the hives at the time of swarming, a thick coat, and shut up the aperture through which the bees entered, so that only one can pass at a time. Indeed as a very small portion of air is necessary for bees in their torpid state, it were better, during severe frosts, to be entirely shut up, as numbers of them are often lost from being enticed to quit the hive by the sunshine of a winter day. It will, however, be proper at times to remove, by a crooked wire or...
Página 162 - It will be proper then to rince the corn with cold water, in order to remove any portion of the water which had taken up the must ; after which the corn being completely drained, is without loss of time to be thinly spread on the floor of a kiln, and thoroughly dried, care being taken to. stir and to turn it frequently during this part of the process.
Página 179 - The swarming of bees generally commences in June ; in some seasons earlier, and in cold climates or seasons later. The first swarming is so long preceded by the appearance of drones and hanging out of working bees, that if the time of their leaving the hive is not observed it must be owing to want of care. The signs of the second are, however, more equivocal, the most certain being that of the queen, a day or two before swarming, at intervals of a few minutes, giving out a sound a good deal resembling...
Página 186 - This work should be performed in the best weather the winter will afford ; that is, not while it rains, or snow is lying on the ground, as it would tend to make the land heavy and sour ; all this is to be particularly attended to, as the preparation of the soil is of more consequence than all the management afterwards. At the time of planting, I always spread over the ground another thin coat of very rotten dung, and point it in half a spade deep.
Página 72 - ... in the fruit, preys upon its pulp and juices, until in most instances, the fruit perishes, falls to the ground and the insect escaping from so unsafe a residence, makes a sure retreat into the earth : where, like other beetles, it remains in the form of a grub or worm, during the winter, ready to be metamorphosed into a bug or beetle, as the spring advances. Thus every tree furnishes its own enemy ; for although these bugs have manifestly the capacity of flying, they appear very reluctant in...
Página 72 - The species are said to be very numerous. The immense damage done, by an insect of this tribe, to the fruits of this country, of which there is no similar account in Europe, has given rise to a conjecture with some naturalists, that we have a peculiar and very destructive species in America. " The manner in which this insect injures and destroys our fruits, is, by its mode of propagation.. ..Early in the spring, about the time when the fruit trees are in blossom, the Curculiones ascend in swarms...