172 Index. 



PAGE 



Contact zone 147 



Continuous spectra 132 



Convex lens, formation of images 6 



" " , Refraction by 4, 6 



Copper, alloy with silver 163 



' ' , microchemical tests for 151 



Corchorus 87 



Corn-starch 59, 64 



" , microscopic structure 65 



Cotton 81 



" -fibre 81, 82 



" " , canal 82 



" " , chemical treatment 83 



" " , composition 8z 



" " .length "82 



" " , mercerization 83 



" " ; preparation 82 



Cotton paper 95 



Cover-glass, effect of 31, 32 



" , measurement of 32, 39 



Cover-glasses, cleaning 41 



Crystal angles 143 



" " , measurement 155 



Cryohydrate 164 



Crystals (see Minerals). 



" .anisotropic. 159.161,162 



" .biaxial 159 



" , formation of 142 



" .habitus *. 143 



" , hexagonal 159, 160, 162 



" , isotropic 159, 162 



' ' , microscopic study of , 142 



" , monoclinic 159, 160. 162 



" , orthorhombic 159, 160, 162 



" , tetragonal 159, 160. 162 



" , triclinic 159, 160. 162 



" , uniaxial 159 



Curvature of lens 6 



" " the field 35 



Cytology , . . . r 105 



Dark-ground illumination 27 



