The calculator: being correct and necessary tables for computation. Adapted to science, business, and pleasure / By James Dodson.
- James Dodson
- Date:
- 1747
Licence: Public Domain Mark
Credit: The calculator: being correct and necessary tables for computation. Adapted to science, business, and pleasure / By James Dodson. Source: Wellcome Collection.
67/196 page 53
![The Ufe of Table the 28the $3 . Put § = Side. R = Radius of the circumfcribing Crete” r = Radius of the infcrib’d Circle. a@ = Area of the Polygon. { = The proper Tabular Number. Given. ore ee rs ee ee ia ee OSS OF. poe mek tyr ee Re aoe RR T. i A etter OR Se TS ae ae ZT, a ls a fed; Res ee fo Fe The Ufe of Table the 29th. Let J = the proper Tabular Number. Given. , : Ss 1R=-S8T: r= ST: 2-8 S87; X=S SST Rol sR Fs res. ZeRATs PE ReERT r co Ree Bese Th XarrrT Uh js =v2 fy Ria ET: poe / ZT; Pm oe See x § =Y TT R= Veli te Als Gey AT Ue of Table 30. The moft neceffary Cafes of Navigation. CAS:E I. Given the Lattitudes and Departure; Required the Courfe, Diftance and Difference of Longitude, I. With the Difference of Lattitude and. Departure taken together,. find the Courfe among the Degrees, and Diftance at the Head. of the Columns. I], With the Co-middle Lattitude among the Degrees and De- parture in it’s Column, find the Difference of Longitude among: the Diftances, ' | CASEN. Given the Lattitudes.and Longitudes of two Places 5. Required the Bearings and Diftance. I. With the Co-middle Lattitude among the Degrees and Diffe- rence of Longitude among the Diftances, find. the Departure in its Column. I, With the Difference of Lattitude and Departure taken. together, find the Courfe among the Degrees and Diftance at Top. CASE Iifl. Given the Courfe and Diftance fail’d ; Required the Difference of Lattitude and Longitude. I. With the Courfe among the Degrees and Diftance at the Top: of the Columns, find the Difference of Lattitude and Departure in their Columns. II. With the Co-middle Lattitude among the Degrees and De- parture in its Column, find the Difference of Longitude among the Diftances.](https://iiif.wellcomecollection.org/image/b30522912_0067.jp2/full/800%2C/0/default.jpg)
