52 BENJ. PIKE'S, JR., DESCRIPTIVE CATALOGUE. 



sen ted on a card at the bottom of the box, and over it the 

 magnetic needle is suspended on a fine point, a glass cover 

 ing the needle, and a brass cap covering the Avhole. 



Price, - 3 Sets. 



" two sizes larger 50cts., and 63cts. 



(Fig. 83, page 53) represents a pocket compass in ? 

 watch form, with a pendant, the case usually gilt and neatly 

 and lightly made. Price, $1.00. 



(Fig. 84, page 53) represents a pocket compass of the 

 best make, having an enamelled dial with all the 360 degrees 

 and all the points of the compass marked thereon, having a 

 fine edge bar needle with agate centre, a stop to lift the 

 needle from the fine point on which it turns, to prevent 

 unnecessary wear when not in use ; the case is either of 

 silver or well gilt, and is enclosed in a morocco case. 



Price, strong gilt case, $9.00. 

 " silver case, $12.00. 



Pocket Compasses (Fig. 85, page 53) in square wood cases, 

 with lever to stop the magnetic needle when the lid is closed, 

 but on opening the lid, is left free to assume its directive 

 tendency. 



Price, 2 inch, $1.25 ; 2 inch, $1.50 ; 3 inch, $2.00. 



The Mariner's Compass (Fig. 86, page 53) consists of a 

 magnetic needle, formed of a thin plate of steel, about six 

 inches long, and half an inch wide, having at its centre a 

 cap fitted to it, usually having an agate centre, which is 

 supported on a sharp pointed pivot fixed in the base of the 

 instrument ; beneath the needle is fixed a circular card, on 

 the circumference of which are divided 360 degrees, while an 

 inner circle, described on it, is marked with the thirty-two 

 points, of which the four, viz. North, South, East, and 

 West, are called cardinal points, .while intermediate between 

 these are N.E. or north-east, S.E. or south-east, s.w. ot 

 south-west, N.W. or north-west, N.b.E. is north by east, N.N.E 

 is north of north-east, etc. ; the pivot of support rises from 

 the bottom of a circular box, which contains the needle and 

 its card, and is covered with a glass ; the compass box i? 

 suspended within a larger square box, by means of twe 

 concentric brass circles, or gimbals, as they are called, th<? 



