The groundwork of practical naval gunnery; a study of the principles and practice of exterior ballistics, as applied to naval gunnery, and of the computation and use of ballistic and range tables . t/?sin2-p = 5° 19 32 ( + )sin p=(-)2° 51 45 = 1° 13 54 2= 2° 27 47 p={-)2° 51 45 <p= 1° 13 54 V= ^° 05 39 138 EXTERIOR BALLISTICS 2*^ = 2° 27 47 sin C= colog A= .00390 log a= .02920 A-a={-).02530 (-)log <^ = 1° 13 54 tan .sec cos A = .0039 colog r = log M = log C= log 1

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The groundwork of practical naval gunnery; a study of the principles and practice of exterior ballistics, as applied to naval gunnery, and of the computation and use of ballistic and range tables . t/?sin2-p = 5° 19 32 ( + )sin p=(-)2° 51 45 = 1° 13 54 2= 2° 27 47 p={-)2° 51 45 <p= 1° 13 54 V= ^° 05 39 138 EXTERIOR BALLISTICS 2*^ = 2° 27 47 sin C= colog A= .00390 log a= .02920 A-a={-).02530 (-)log <^ = 1° 13 54 tan .sec cos A = .0039 colog r = log M = log C= log 6)=(-)7° 5701 ..(-)tan sec ^=r log v = log 190. Assembling the results of these last two problems for comparison, we have: Value forShip attacking ; 4° 08 07. e (-)3° 20 05. t seconds. V f. s. Battery attacking ship. 4° 05 39.(-)7° 57 f. s. In working problems similar to the above, great care must be taken to carrythrough consistently the signs of the several quantities and

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectballistics, bookyear1