46 OPTICAL INSTRUMENTS. 



No. 



1043 Fig. 696, instrument for showing the nature 



of vision, - $ 6.00 



1044 Fig. 697, muscles of the eye, - 2.50 



1045 Figs. 694 to 697, set of the above four in- 



struments, - 13.00 



1046 Figs. 694, 696, and 697, set of the first, 



third, and fourth, - - - 11.00 



1047 Fig. 698, prisms, 37 cts., $1, $1.50, $2, and 3.00 



1048 Fig. 698, prisms, mounted, - - $2 to 5.00 



1049 Compound prisms of three different kinds of 



glass, each having a different refractive 



power, - - 3.00 



1050 Fig. 699, instrument for the recomposition of 



light, - - - 1.00 



1051 Fig. 700, glass box for experiments on re- 



fraction, - $4 and 5.50 



1052 Fig. 701, optical diagonal machine, four 



inch, - - $1.75 and 2.50 



1053 Fig. 701, optical diagonal machine, five 



inch, - - - - $2.25 and 2.50 



1054 Fig. 701, optical diagonal machine, six 



inch, - - - $2.75 and 3.00 



1055 Prints for diagonal machine, fourteen inch 



by twenty-two inch, per dozen, - - 1.00 



1056 Fig. 702, portable camera obscura, $2.50, 



$3.50, and 6.00 



1057 Fig. 703, camera obscura for draughtsmen, 8.00 



1058 Fig. 704, Daguerreotype apparatus, rose- 



wood camera with German arrangement of 

 achromatic lenses, mounted in brass tubes, 

 with rack and pinion motion, - 25.00 



1059 Stand for camera, - - $3 to 5.00 



1060 Two coating boxes, per pair, - 4.50 



1061 Mercury box of cast iron, on foot, - - 1.50 



1062 Plate vice, for holding the plates while 



cleaning, - - 1.75 



1063 Buff sticks, - 0.25 



1064 Thermometer for mercury box, - 0.38 



1065 Glass spirit lamp, - - 20 cts. to 0.75 



1066 Head rest to fasten to chair, - - 3.00 



1067 Daguerreotype plates, medium size, $3 doz. 



quarter size, - - 4.50 



