. The Bell System technical journal . Imk. 13—An cnlarKCfl view oi a spt-ciincn prepared fur micrnscopic cover glass shown by the circle measures y^ inch in diameter. The mmintsare transverse, radial and tangential sections of a wood specimen ami wen-stained to make their structure visilde under the microscope. The appearanriof a transverse section of Douglas Fir at 100 di;mitirs !•; •.hnwti in thelower illustration. .iM> .\in Koscory \\^ of the prtridiiii; oiKration lia\c all liccii rtninvid and fiiur mu-,estahlislKil ii) tlu- luw direction
. The Bell System technical journal . Imk. 13—An cnlarKCfl view oi a spt-ciincn prepared fur micrnscopic cover glass shown by the circle measures y^ inch in diameter. The mmintsare transverse, radial and tangential sections of a wood specimen ami wen-stained to make their structure visilde under the microscope. The appearanriof a transverse section of Douglas Fir at 100 di;mitirs !•; •.hnwti in thelower illustration. .iM> .\in Koscory \\^ of the prtridiiii; oiKration lia\c all liccii rtninvid and fiiur mu-,estahlislKil ii) tlu- luw direction. This is contiiuii-d to the 000 i).ipir,aftiT which the s|Rrinien is further |X)lished on a polishing hinehaving; a covered lap capable of being revolved at varyingspeeds to about 1,200 rpm. This lap is kept moistened with waterand tine aiunduni is used as the abrasive. This operation gives a
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
