INDEX. 175 



PAGE 



Handwriting 138 



" -lines, microscopic appearance of. 140 



" , statistical study of. 139 



Harting 142 



Hemimorphism ; 143 



Hemlock-fibre 100 



Hemp 86 



" -fibre 86 



" , Manila (see Manila Hemp). 



" , Sisal (see Sisal Hemp). 



Herschel 135 



Hertvvig 105 



HiNRICHS 149 



Homogeneous immersion 16 



HooKE 104 



Huyghenian ocular 22 



Illuminating power 35 



Illumination (see Lighting). 



Image, construction of 7, 8 



" , definition of i 



" ., formation of by object inside principal focus 7, 9 



" , formation of by object outside principal focus 7, 8 



" , real 7, 8 



' ' , retinal i 



' ' , retinal, formation of 3 



" , retinal, interpretation of 2 



' ' . virtual 7,9 



Images, formation in compound microscope II, 13 



' ' , formation of, by convex lens 6 



Imbedding in celloidin 49 



" " paraffin 47 



Immersion, objective (see Objective). 



Infusoria in water (see Water, Drinking-). 



Ink, examination of 137 



Interference effects IS^ 



Interpretation of appearances 36 



" " retinal image 2 



lodin chloride, crystals 148 



lodo sulphate of quinin 146 



•Iron in steel i^S 



