. American journal of pharmacy. Fig. 7. transparent becomes opaque, and the opaque one diaphanous, asin fig. 6. The depolarizing effect of the crystals is best seen by usingone tourmaline, placing a crystal of iodide across its axis, so thatit shall become opaque, and then twQ crystals of the iodide acrossthis at an angle of 45°, so thattheir opposite ends shall cross eachother at 90° at a distance from theopaque crystal, as in fig. 7, a, b, caThe crystals a and 6 being in the de-polarizing angle, exhibit this pheno-menon, except where they cross eachother at right angles, at which pointcomple
. American journal of pharmacy. Fig. 7. transparent becomes opaque, and the opaque one diaphanous, asin fig. 6. The depolarizing effect of the crystals is best seen by usingone tourmaline, placing a crystal of iodide across its axis, so thatit shall become opaque, and then twQ crystals of the iodide acrossthis at an angle of 45°, so thattheir opposite ends shall cross eachother at 90° at a distance from theopaque crystal, as in fig. 7, a, b, caThe crystals a and 6 being in the de-polarizing angle, exhibit this pheno-menon, except where they cross eachother at right angles, at which pointcomplete polarization is effected, asis seen by the black square. Wherea and b cross the polarized field of e, depolarization takes plaee?and two rhomboidal spaces, pink and green, appear. When two tourmalines are employed, the results are more com- Fig. 8. Fig.
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Keywords: ., bookcentury1800, bookdecade183, booksubjectpharmacy, bookyear1835
