Explosives . Fig. 1!». Xitri<- Acid Still action upon it. Such breakages are aoi so frequenl now : they can he avoidedto a large extent by not immersing the firsl coil in water, but cooling it byrunning water over cloths laid on the coil. Coils can now he obtained madeof fused silica or vitreosil as much as - inch. - in diameter and 60 feel are much more resistant than stone-ware and can be repaired whenbroken. The principal peculiarity of Dr. Yalentiner- system is that the distillation NITRIC ACID 109 is carried out in vacuo. At the end of the series of condensers and jars shown
Explosives . Fig. 1!». Xitri<- Acid Still action upon it. Such breakages are aoi so frequenl now : they can he avoidedto a large extent by not immersing the firsl coil in water, but cooling it byrunning water over cloths laid on the coil. Coils can now he obtained madeof fused silica or vitreosil as much as - inch. - in diameter and 60 feel are much more resistant than stone-ware and can be repaired whenbroken. The principal peculiarity of Dr. Yalentiner- system is that the distillation NITRIC ACID 109 is carried out in vacuo. At the end of the series of condensers and jars shownin Fig. 21 there is a vacuum pump, which with every stroke draws in somecaustic soda solution to prevent the acid fumes attacking the metal of the c2 (^ ? fcrmK. « n r */*>+m-Hi-jmr Fig. 20. Guttmanns Condensing Battery for Nitric Acid. pump too much. The large number of small washing jars is also to absorbthe acid fumes as far as possible before they reach the pump. The advantagesclaimed for the system are that the time of working a charge is much shortenedby the use of a vacuum, that the process is under better control, and that 3800mm
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Keywords: ., bookcentury1900, bookdecade1910, bookidexp, booksubjectexplosives
