. The Pharmaceutical era. Fig. 26.—Abbe CoiuUiiser. surface is toob r i 11 i a u t, itshould be shad-ed by interpos-ing a screen be-tween it andthe source oflight. With the Abl)ccamera lucida as manufactured by Bausch and Lomb there is supplied acompensation prism, comprised of two wedges, one ofsmoked and one of clear glass. By a careful adjustmentof this prism a point may lie found where the image ofthe object and the drawing surface are of equal bright-ness. In order that there be no distortion in tlie drawing itis essential that the axial ray from the image in the mi-croscope should after
. The Pharmaceutical era. Fig. 26.—Abbe CoiuUiiser. surface is toob r i 11 i a u t, itshould be shad-ed by interpos-ing a screen be-tween it andthe source oflight. With the Abl)ccamera lucida as manufactured by Bausch and Lomb there is supplied acompensation prism, comprised of two wedges, one ofsmoked and one of clear glass. By a careful adjustmentof this prism a point may lie found where the image ofthe object and the drawing surface are of equal bright-ness. In order that there be no distortion in tlie drawing itis essential that the axial ray from the image in the mi-croscope should after reflection strike the drawing sur-face exactly at a right angle. This will be the casewhen the reflecting mirror is inclined exactly 45 de-grees. When inclined at less than this angle, the draw-ing board should be raised twice as many degrees to-ward the microscope as the mirror is depressed below45 degrees. (Fig. 32.). THE PRACTICE OF PHARMACY IN RUSSIA.*By PROSPER II. MARSDEN, In the earliest recorded days of the vast countrywhich is now Russia, the healing art was in the handsof wizards and wolfmen, sorcerers and seers, who wereat once physicians, surgeons, prophets and historians,who transmittedthe traditions oftheir race fromgeneration to gen-eration. Of the Scyth-ians, who in-habited the coun-try at the pe-riod of which Iam s p e a k i n g,very little isknown. At the •«. im.,,,,,, famous museum in St. Petersburg, The Hermitage,there is a valuable collection of relics of the Scythiandays. One of the most remark-:\\<\v examples of the ar-tistic talent displayed atthat date is a vase of elec-trum. most probably oftJreek manufacture, or re-pousse work. It depictsa Scythian battlefield; onone side we see a chieftainconsulting a wolfmau, an-other of these surgeonsexamining a mans jawfor loose teeth or brokenbones, and a third ban-daging a limb, much as itis done at the presenttim
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Keywords: ., bookcentury1800, booksubjectdrugs, booksubjectpharmacy, bookyear1
