Now showing items 11-14 of 14
First Paragraph: | One way of drawing a cardioid is to make a pen start in phase 90° from the center of a disk and move along a radius with simple harmonic motion, while the disk revolves with a uniform angular speed of ...
Identification of Wires in a Cable
First Paragraph: | For telephone men and others who are accustomed to handle cables with hundreds of wires in them, their identification is mere child’s play, as it is done by the color or character of its insulation, its ...
The Frequency of Total Eclipses of the Sun at a Given Place
First Paragraph: | We may put it down as a fact, that whenever an eclipse of the Sun occurs at any place, the astronomer there is sure to be asked, especially by the representatives of the press: “Does an eclipse of the ...
The Accuracy of Oppolzers Eclipse Maps
First Paragraph: | There is a very general misconception of the accuracy of Oppolzer’s eclipse maps. This astronomer, as is well known, published in 1885 that immortal work entitled "Canon der Finsternisse,” which gives ...