35° MifctUanea Curio fa* 



that is, half the Latus retlum of ail the Parabola 

 made with the fame Impetus, 



i\V L E. 



Take half the Diftance of the Object from 

 the Nadir, and take the Difference of the given 

 Elevation from that half ; the Verfed Sine of twice 

 that Difference fubtraft from the Verfed Sine of 

 the Diftance of the Object: from the %enith: 

 Then (hall the Difference of thole Verfed Sines 

 be to the Sine of the Diftance of the Object from 

 the %enith 9 as the Horizontal Diftance of the Ob- 

 ject ltrook, to the greateft Horizontal Range 

 at 45°. 



p HO p. II. 



Having the greateft Horizontal Range of a 

 Gun, the Horizontal Diftance and Angle of In- 

 clination of an Object to the Perpendicular, to 

 find the two Elevations neceffary to ftrike that 

 Object. 



^ V L E. 



Halve the Diftance of the Objeft from the 

 mdir ; this half is always equal to the half 

 Sum of the two Elevations we leek. Then fay, 

 As the greateft Horizontal i\ange is to the Horizon- 

 tal Diftance of the Objeft: So is the Sine of the 

 Angle of Inclination or Diftance of the Objeft from 

 the Perpendicular, to a fourth Proportional , which 

 fourth being fubtr aft ed from the Verfed Sine of the 

 Diftance of the Objeft from the Zenith, leaves the 

 Verfed Sine of the Difference of the Elevations 



fought ; 



