MATHEMATICAL INSTRUMENTS. 3 

 No. 



21 Fig. 9, ruling pens, best quality, turn up nibs, 



ivory handle, 1.25 



22 Fig. 10, ruling pens, best quality, ivory handle, 1.25 



23 Fig. 11, road pen, - $3.00 and 3.50 



24 Fig. 5 and Fig. 12, dotting pen, - $2.25 to 6.00 



25 Fig. 13, needle holder, 1.25 



26 Bow compasses, in brass, $1 ; in German silver, 1.38 



27 Fig. 15, bow pen, in brass, $1, in German 



silver, - - ^ - 1.38 



28 Fig. 16, bow pencil, brass, $1 ; German silver, 1.38 



29 Fig. 17, bow pen, double jointed in legs, brass, 



$3, German silver, 4.00 



30 Fig. 18, bow pencil, double jointed in legs, 



brass, $3, German silver, 4.00 



31 Fig. 19, bow pen of fine French make, $1.75 to 3.00 



32 Fig. 20, bow compasses, two inch, with ink 



and pencil point, brass, - 1.75 



33 Fig. 20, bow compasses, two inch, with ink 



and pencil point, German silver, -* ^ 3.00 



34 Fig. 21, steel bow compasses, - 2.00 



35 Fig. 22, steel bow pen, 2.25 



36 Fig. 23, steel bow pencil, - 2.25 



37 Steel universal bow, with pen and pencil to 



change, - 3.50 



38 Fig. 24, needle point bow instruments, $2 to 7.00 



39 Fig. 25, proportional compasses in brass, $4 and 4.50 



40 Fig. 25, " with adjusting screw, $6 and 6.50 



41 Fig. 25, " in German silver, - 6.00 



42 Fig. 25, " with adjusting screw, in 



German silver, 8.50 



43 Proportional compasses, with adjusting points, 



$6 to 10.00 



44 Fig. 25, " " extra finish, $10 to 14.00 



45 Fig. 26, bisecting compasses, in brass, $1.25 



German silver, - - 3.00 



46 Fig. 27. triangular compasses, in brass or Ger- 



man silver, - $4 to 7.50 



47 Fig. 28, pillar compasses with bow handles, $5 to 7.50 



48 Fig. 29, universal tube compasses with points 



to turn, - $10 to 15.00 



49 Fig. 30, beam compass, with brass bar to ex- 



tend, 7.50 



