INDEX. i8i 



PAGE 



Silver, microchemical tests for 150 



Sisal hemp 89 



Skeleton crystals 143 



Slides, cleaning 41 



Sodium chloride, crystals 143 



Spectra of gases and solids 132 



" " organic bodies. . : 133 



Spectroscope 131 



Sphserulites 143 



Spherical aberration (see Aberration). 



Spruce-fibre 100 



Sputum, examination of 115 



Staining 49 



" , blood-cells ill 



" , diphtheria bacilli 117 



" , tubercle bacilli 116 



" , with hsematin and eosin 50 



Stage micrometer (see Micrometer). 

 " (see Microscope, stage). 



Starch, as index of food adulterants 69 



" , in baking powder 62 



' ' , commercial uses for 60 



" , conversion into sugar 62 



" , formula of 5^ 



" , in chlorophyll 59 



" , in flour 61 



" , in grains 60 



" , in potato 59, 61 



" , microscopy of 62 



" , nature of • • • • 5^ 



" , origin of 5° 



" paste 61 



" ; preparation for market 59 



" ; prices of ^ 



" , refining, of 59 



" , uses of °i 



Starches of pea and bean 66 



State Board of Health of Massachusetts, work on food adulterants. . 71 



Steel, composition of ■. 165 



" , metallography of 165 



Steno, law of 143 



