Treatise on natural philosophy : Vol 1. Part 2 / by Sir William Thomson and Peter Guthrie Tait.
- Date:
- 1883
Licence: Public Domain Mark
Credit: Treatise on natural philosophy : Vol 1. Part 2 / by Sir William Thomson and Peter Guthrie Tait. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
488/594 page 458
![ABSTRACT DYNAMICS. [848. Results of reduction. Indian Ports (continued). [Indian Tide Tables, 1881-2.] Place Latitude.. VlZAGAPATAM. 17° 41' Madras. 13° 4' Port Blair, Ross Island. 11° 40^' 30. 31. 32. 33. Year 1879-80. 1880-1. 1880-1. 1880-1. E. •036 •055 •032 •059 o5 rC • i—< EH >> r—i -< €. 3°-07 317°-54 341°-95 332°-33 e — 2v. + 24° 16' -17° 43' + 6° 41' — 2° 56' W '8 A. + ‘0328 + -0524 + •0318 + •0589 •g o pH B. 4- -0148 - ‘0167 + -0037 - -0029 L a. •0597 •0534 •0626 •0649 ' R. •021 •077 •040 •020 <D €. 22°-48 52°-54 40°-65 12°-95 Eh \ 6. + 22° 29' + 52° 33' + 40° 39' + 12° 57' a ■4-= a o C. + •0194 + -0468 + -0304 + -0195 a D. + -0080 + •0611 + •0260 + •0045 c. •0242 •0253 •0296 •0307 Gauss’s notation is adopted for the reductions*. That is to say, [AA] denotes the sum of the squares of the A’s, and [Aa] the sum of the products of each A into its corresponding a. In computing the value of a for the fortnightly tide the factor (1 —-|e2) which occurs therein was treated as being equal to unity; since |e2=‘00754, it follows that the [aa], which would be found from the numbers given in the table, must be multiplied by (1 —‘01508), and the [Aa] and [Ba] by (1--00754). After introducing these correcting factors the following results were found ; [aa]=-14573, [AA]=-09831, [BB]=‘02576, [Aa]=-09836, [Ba]=‘00291 [cc]=-02253, [CC]=‘11588, [DD]=-07552, [Cc]=*01533, [Dc]=‘00202. See Gauss’s works, or the Appendix to Chauvenet’s Astronomy.](https://iiif.wellcomecollection.org/image/b21987312_0488.jp2/full/800%2C/0/default.jpg)
