into the vat of melted tallow.
2. (Dyeing.) A frame on which the fabric is stretched and immersed in dyeing with indigo.
The inclination or dip of the magnetized needle was not known to the Chinese, who had discovered its variation during the twelfth century.
This element of terrestrial magnetism appears to have been discovered by Robert Norman, a compass-maker of Ratcliff, London, who detected the dip and published the fact in 1576.
He contrived the dipping-needle, and found the dip at London to be 71° 50′. See also dip-circle.
Captain Sir James Ross, the celebrated Arctic navigator, reached the magnetic pole, latitude 70° 5′ 17″ north, and longitude 96° 46′ 45″ west, on the 1st of June, 1831.
The amount of dip was 89° 59′. Horizontal needles refused to work, showing no sensitiveness.
He erected a cairn of limestone rocks, inclosing a tin case containing the record.
The cairn may remain, unless the
verer was nearly brought to an abrupt conclusion by the discovery of this error.
See mariner's compass.
The dip of the magnet was discovered by Robert Norman, 1576.
The magnet worn by Sir Isaac Newton in his ring weighed only 3 grains, yet was able to take up 746 grains, or nearly 250 times its own weig balance when touched by the loadstone.
Robert Norman of London, a maker of compasses, was the first, so far as we know, to detect the dip and publish the fact; 1576.
He contrived the dipping-needle, suspended on a horizontal axis, and found the dip at London to be 71° 50′.
Robert Halley, in 1700, published a chart, having 10 B. C.
The gimbal-joint and compass-box were invented by the Rev. William Barlowe in 1608.
The dip of the needle was discovered by Robert Norman of London, 1576; the diurnal variation, by Graham, a London watchmaker, in 1722.
An azimuth compass is one used at sea for finding the horizonal distance of the sun or a star f
The length of the degrees of longitude at every tenth degree is as follows: —
Latitude.Length of degree of longitude in English feetLatitude.Length of degree of longitude in English feet.
Odometers were possessed by Augustus, the Elector of Saxony, A. D. 1553-86, and for Emperor Rodolphus II. 1576-1612.
In the eighteenth century they became common, and descriptions are found in scientific reports and works of that date.
Hohlfield, born at Hennerndorf, in Saxony, in 1711, seems to have much improved the instrument.
A new French instrument, termed a compteur mecanique, or calculating-machine, not only reckons the distance traversed, but indicates as well the exact sum of money due to the driver.
Two dials are fixed on the back of the driving-seat; one contains a clock, while on
in other places.
All the present modes of using the tobacco plant originated in America.
a. Columbus noticed that the natives of the West India islands used the leaves in rolls, — cigars.
The Aztecs had cigar tubes, and also used nostril tubes of tortoise-shell for inhaling the smoke.
The Mexicans and North American Indians used pipes.
Ovideo speaks in 1426 of the inhaling of the smoke through the forked nostril tube by the Indians of Hispaniola.
Lobel, in his History of plants, 1576, gives an engraving of a rolled tube of tobacco (a cigar) as seen by Colon in the mouths of the natives of San Salvador.
He describes it as a funnel of palm-leaf with a filling of tobacco leaves.
The pipe is shown in the engravings to Be Bry, Historia Braziliana, 1590.
b. Cortez found smoking the pipe to be an established custom in Mexico.
Bernal Diaz relates that Montezuma had his pipe brought in great state by the ladies of his court after he had dined, and washed his mouth with scent
ough indeed from very imperfect observations, as early as 1530, or a century and a half before Halley.
The movement of the magnetic lines, the first recognition of which is usually ascribed to Gassendi, was not even yet conjectured by William Gilbert; but at an earlier period Acosta, from the information of Portuguese navigators, assumed four lines of no declination upon the surface of the globe.
Hardly had the inclinometer, or dipping-needle, been invented in England by Robert Norman, in 1576, than Gilbert boasted that by means of this instrument he could determine the position of a ship in a dark and starless night.
Pope Alexander VI adopted the line of no variation discovered by Columbus 100 miles west of the Azores, as the easterly limit of the papal grant to the Spaniards, May, 1493.
He was not aware, no blame to him, that the line was slowly moving east, and would soon be far removed from its first-observed position.
It was reserved for a future age to show the incorrec