INDEX 
479 
PAGE 
Vapors, tests involving. 314 
Velocity of abrasive wheels. 434 
Vertical illumination, appearances in. 30 
Vertical illuminators. 77 
adjustment of. 78 
auxiliary stage with. 88 
disk. 78 
lamp for use with. 158 
Leitz. 83 
Nachet...... 82 
objectives for use with. 80 
polarized light with. 51 
prism. 78 
stand for use with. 85 
Tassin. 85 
Vises and clamps. 170 
Watch glasses. 152 
Weight, determination of. 212 
Work tables. 156 
Working distance. 2 
Works microscopes. loi 
Zinc, common salts. 353 
detection by potassium mercuric thiocyanate. 353 
oxalic acid. 359 
sodium bicarbonate. 357 
nitroprusside. 361 
sulphide fibers, preparation of. 449 
as reagent. 415 
